SIST EN 16602-70-71:2016
(Main)Space product assurance - Materials, processs and their data selection
Space product assurance - Materials, processs and their data selection
This Standard specifies the requirements applicable to materials, processes and their data selection to satisfy the mission performance requirements.
This Standard covers the following:
• selection criteria and rules;
• utilization criteria and rules.
The provisions of this Standard apply to all actors involved at all levels in the production of space systems. These can include manned and unmanned spacecraft, launchers, satellites, payloads, experiments, electrical ground support equipment, mechanical ground support equipment, and their corresponding organizations.
This standard may be tailored for the specific characteristics and constraints of a space project in conformance with ECSS-S-ST-00.
Raumfahrtproduktsicherung - Werkstoffe, Prozesse und Angaben zu ihrer Auswahl
Assurance produit des projets spatiaux - Matériaux, procédés et les données pour leur sélection
La présente norme spécifie les exigences applicables à la sélection des matériaux, des processus et des données associées pour satisfaire aux exigences de performance de la mission.
La présente norme couvre les points suivants :
• les critères et règles de sélection ;
• les critères et règles d'utilisation.
Les dispositions de la présente norme s'appliquent à tous les acteurs impliqués à tous les niveaux de la production de systèmes spatiaux. Ceux-ci peuvent inclure les engins spatiaux habités ou non habités, les lanceurs, les satellites, les charges utiles, les expériences, les équipements électriques et mécaniques de support au sol et les organisations correspondantes.
La présente norme peut être adaptée aux caractéristiques et contraintes spécifiques d'un projet spatial, conformément à l'ECSS-S-ST-00.
Zagotavljanje varnih proizvodov v vesoljski tehniki - Materiali, procesi in podatki za njihovo izbiro
Ta standard določa zahteve, ki se uporabljajo za materiale, postopke in izbiro podatkov o njih za izpolnjevanje zahtev glede ciljev misije. Standard zajema naslednje: • merila in pravila za izbiro; • merila in pravila za uporabo. Določbe tega standarda se uporabljajo za vse izvajalce, vključene na vseh ravneh proizvodnje vesoljskih sistemov. Zajemajo lahko vesoljska plovila s posadko ali brez nje, lansirnike, satelite, tovore, poskuse, električno podporno opremo na tleh, mehansko podporno opremo na tleh in njihove ustrezne ureditve. Ta standard se lahko prilagodi posameznim lastnostim in omejitvam vesoljskega projekta v skladu s standardom ECSS-S-ST-00.
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zagotavljanje varnih proizvodov v vesoljski tehniki - Materiali, procesi in podatki za njihovo izbiroRaumfahrtproduktsicherung - Werkstoffe, Prozesse und Angaben zu ihrer AuswahlAssurance produit des projets spatiaux - Matériaux, procédés et les données pour leur sélectionSpace product assurance - Materials, processs and their data selection49.140Vesoljski sistemi in operacijeSpace systems and operationsICS:Ta slovenski standard je istoveten z:EN 16602-70-71:2016SIST EN 16602-70-71:2016en,fr,de01-november-2016SIST EN 16602-70-71:2016SLOVENSKI
STANDARD
SIST EN 16602-70-71:2016
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16602-70-71
August
t r s x ICS
v {ä s v r
English version
Space product assurance æ Materialsá processes and their data selection
Assurance produit des projets spatiaux æ Matériauxá procédés et les données pour leur sélection
Raumfahrtproduktsicherung æ Werkstoffeá Prozesse und Angaben zu ihrer Auswahl This European Standard was approved by CEN on
t t May
t r s xä
C Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN and CENELEC memberä
translation under the responsibility of a CEN and CENELEC member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels y any means reserved worldwide for CEN national Members and for CENELEC Membersä Refä Noä EN
s x x r tæ y ræ y sã t r s x ESIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 2 Table of contents European Foreword . 4 1 Scope . 5 2 Normative references . 6 3 Terms, definitions and abbreviated terms . 8 3.1 Terms from other standards . 8 3.2 Terms specific to the present standard . 8 3.3 Abbreviated terms. 9 3.4 Nomenclature . 10 4 Specific requirements . 11 4.1 Overview . 11 4.2 Material requirements . 11 4.2.1 General requirements . 11 4.2.2 Aluminium and aluminium alloys . 11 4.2.3 Copper and copper alloys . 12 4.2.4 Nickel and nickel alloys . 12 4.2.5 Titanium and Titanium alloys . 12 4.2.6 Steels . 13 4.2.7 Stainless steels . 13 4.2.8 Filler metals: welding, brazing, soldering . 13 4.2.9 Miscellaneous metallic materials . 14 4.2.10 Optical materials . 15 4.2.11 Adhesives, coatings, varnishes . 15 4.2.12 Adhesive tapes . 16 4.2.13 Paints and inks . 17 4.2.14 Lubricants . 17 4.2.15 Potting compounds, sealants, foams . 18 4.2.16 Reinforced plastics including PCBs . 18 4.2.17 Rubbers and elastomers . 19 4.2.18 Thermoplastics . 20 SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 3 4.2.19 Thermoset plastics or PCBs . 21 4.2.20 Material aspects of wires and cables . 21 4.2.21 Ceramics and other nonmetallic materials . 22 4.3 Process requirements . 22 4.3.1 Adhesive bonding . 22 4.3.2 Composite manufacture . 23 4.3.3 Encapsulation and moulding and varnishing . 23 4.3.4 Painting and coating . 24 4.3.5 Cleaning . 24 4.3.6 Welding and brazing . 24 4.3.7 Crimping and stripping and wire wrapping . 26 4.3.8 Soldering . 26 4.3.9 Surface treatments . 26 4.3.10 Plating . 28 4.3.11 Machining . 29 4.3.12 Forming . 30 4.3.13 Heat treatment . 32 4.3.14 Marking . 32 4.3.15 Miscellaneous processes . 32 4.3.16 Inspection procedures . 34 Annex A (informative) Information about the European Space Materials Database (ESMDB) . 35 A.1 Overview . 35 A.2 Database access . 35 A.3 Database structure . 35 A.4 Database quality ratings . 37 Bibliography . 38
SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 4 European Foreword This document (EN 16602-70-71:2016) has been prepared by Technical Committee CEN-CENELEC/TC 5 “Space”, the secretariat of which is held by DIN. This standard (EN 16602-70-71:2016) originates from ECSS-Q-ST-70-71C. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2017, and conflicting national standards shall be withdrawn at the latest by February 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This document has been developed to cover specifically space systems and has therefore precedence over any EN covering the same scope but with a wider domain of applicability (e.g. : aerospace). According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 5 1 Scope This Standard specifies the requirements applicable to materials, processes and their data selection to satisfy the mission performance requirements.
This Standard covers the following: • selection criteria and rules; • utilization criteria and rules. The provisions of this Standard apply to all actors involved at all levels in the production of space systems. These can include manned and unmanned spacecraft, launchers, satellites, payloads, experiments, electrical ground support equipment, mechanical ground support equipment, and their corresponding organizations. This standard may be tailored for the specific characteristics and constraints of a space project in conformance with ECSS-S-ST-00. SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 6 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this ECSS Standard. For dated references, subsequent amendments to, or revisions of any of these publications do not apply. However, parties to agreements based on this ECSS Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references the latest edition of the publication referred to applies.
EN reference Reference in text Title EN 16601-00-01 ECSS-S-ST-00-01
ECSS system - Glossary of terms EN 16603-20-06 ECSS-E-ST-20-06 Space engineering - Spacecraft charging EN 16603-32-08 ECSS-E-ST-32-08 Space engineering - Materials EN 16602-20 ECSS-Q-ST-20 Space product assurance - Quality assurance EN 16602-70 ECSS-Q-ST-70 Space product assurance - Materials, mechanical parts and processes EN 16602-70-02 ECSS-Q-ST-70-02 Space product assurance - Thermal vacuum outgassing test for the screening of space materials EN 16602-70-04 ECSS-Q-ST-70-04
Space product assurance - Thermal testing for the evaluation of space materials, processes, mechanical parts and assemblies EN 16602-70-07 ECSS-Q-ST-70-07 Space product assurance - Verification and approval of automatic machine wave soldering EN 16602-70-08 ECSS-Q-ST-70-08 Space product assurance - Manual soldering of high-reliability electrical connections EN 16602-70-10 ECSS-Q-ST-70-10 Space product assurance - Qualification of printed circuit boards EN 16602-70-11 ECSS-Q-ST-70-11 Space product assurance - Procurement of printed circuit boards EN 16602-70-12 ECSS-Q-ST-70-12 Space product assurance - Design rules for printed circuit boards EN 16602-70-18 ECSS-Q-ST-70-18 Space product assurance - Preparation, assembly and mounting of RF coaxial cables EN 16602-70-26 ECSS-Q-ST-70-26 Space product assurance - Crimping of high-reliability electrical connections SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 7 EN 16602-70-28 ECSS-Q-ST-70-28 Space product assurance - Repair and modification of printed circuits board assemblies for space use EN 16602-70-30 ECSS-Q-ST-70-30 Space product assurance - Wire wrapping of high-reliability electrical connections EN 16602-70-31 ECSS-Q-ST-70-31 Space product assurance - Application of paints on flight hardware EN 16602-70-38 ECSS-Q-ST-70-38 Space product assurance - High-reliability soldering for surface-mount and mixed technology EN 16602-70-39 ECSS-Q-ST-70-39 Space product assurance - Processing and quality assurance requirements for welding of metallic materials for flight hardware
ESCC 3901 Generic specification - Wires and cables, electrical, 600V, low frequency
ESCC 3902 Generic specification - Cables, coaxial, radio frequency, flexible
ESCC 3903 Generic specification - Solid wires, electrical 350 V, for wire wrapping SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 8 3 Terms, definitions and abbreviated terms 3.1 Terms from other standards a. For the purpose of this Standard, the terms and definitions from ECSS-S-ST-00-01 apply, in particular for the following terms: 1. assembly 2. component 3. corrosion
4. lot 5. material 6. part 7. process 8. relifing 9. repair b. For the purpose of this Standard, the terms and definitions from ECSS-E-ST-32 apply, in particular for the following terms: 1. A-basis design allowable (A-value) 2. B-basis design allowable (B-value) 3.2 Terms specific to the present standard 3.2.1. plate form of material having a thickness of >6 mm 3.2.2. sheet form of material having a thickness >0,2 mm and <6 mm 3.2.3. foil form of material having a thickness <0,2 mm SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 9 3.2.4. thick coatings coating with such a thickness that the properties of the substrate do not significantly influence the coating properties NOTE A thick homogeneous coating can be as such treated as if it were effectively a bulk material. The thickness is generally above approximately 125 µm. 3.2.5. debubbling removal of bubbles performed by low pressure process between the coating line and the coating stand NOTE The pressure can be high enough not to cause boiling. The low-pressure causes the bubbles to expand and thus rise faster. 3.2.6. unstabilized stainless steel steels from the 300 series which do not contain Titanium or Niobium as a stabilizing element against the formation of iron-carbides NOTE The iron-carbide formation is also called sensitization and occurs during prolonged heating at temperatures above 370 °C. Iron-carbide formation can also be avoided using lower carbon grades. 3.2.7. exfoliation corrosion that proceeds along planes parallel to the surface, generally at grain boundaries, forming corrosion products that create a wedging stress, giving rise to a layered appearance NOTE This form of corrosion is associated with a marked directionality of the grain structure. Applied stresses are not necessary for exfoliation to occur. However, in alloys susceptible to stress corrosion cracking, the corrosion product wedging action undoubtedly contributes to the propagation of the exfoliation attack. It is important to note that some alloys not susceptible to stress corrosion cracking can suffer exfoliation corrosion. However, if the grain structure is equiaxed, exfoliation corrosion does not usually occur. 3.3 Abbreviated terms For the purpose of this Standard, the abbreviated terms from ECSS-S-ST-00-01 and the following apply: Abbreviation Meaning ATOX atomic oxygen EDM electro discharge machining SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 10 Abbreviation Meaning ESMDB European Space Materials Database DPL declared parts list GOX gaseous oxygen KIc fracture toughness KIscc stress-corrosion cracking threshold stress intensity factor LOX
liquid oxygen
MMPDS metallic materials properties development and standardization MPCB materials and processes control board NDI non-destructive inspection
PTFE polytetrafluroethylene SCC stress-corrosion cracking UTS
ultimate tensile strength 3.4 Nomenclature The following nomenclature applies throughout this document: a. The word “shall” is used in this Standard to express requirements. All the requirements are expressed with the word “shall”. b. The word “should” is used in this Standard to express recommendations. All the recommendations are expressed with the word “should”. NOTE It is expected that, during tailoring, recommendations in this document are either converted into requirements or tailored out. c. The words “may” and “need not” are used in this Standard to express positive and negative permissions, respectively. All the positive permissions are expressed with the word “may”. All the negative permissions are expressed with the words “need not”. d. The word “can” is used in this Standard to express capabilities or possibilities, and therefore, if not accompanied by one of the previous words, it implies descriptive text. NOTE In ECSS “may” and “can” have completely different meanings: “may” is normative (permission), and “can” is descriptive. e. The present and past tenses are used in this Standard to express statements of fact, and therefore they imply descriptive text. SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 11 4 Specific requirements 4.1 Overview This Standard applies together with the ECSS-Q-ST-70. NOTE Annex A provides information about the European Space Materials Database (ESMDB). 4.2 Material requirements 4.2.1 General requirements a. Design stresses shall include all residual stresses including those coming from manufacturing and assembly processes. b. Alloys, heat treatments and coatings which minimize susceptibility to general corrosion, pitting, intergranular and stress corrosion cracking shall be used. 4.2.2 Aluminium and aluminium alloys a. Wrought heat-treatable products shall be mechanically stress relieved. NOTE For example in TX5X or TX5XX tempers. b. Wrought alloys 5456, 5083 and 5086 shall be used only in controlled tempers for resistance to SCC and exfoliation. NOTE Examples of controlled tempers are H111, H112, H116, H117, H323, H343. c. Long-term manned structures, shall not use aluminium alloys 2024-T6, 7079-T6 and 7178-T6 in structural applications. d. Black anodising shall not be used on 2000 and 7000 series of Aluminium Alloys. NOTE The black anodizing of metals is covered by ECSS-Q-ST-70-03. e. Long-term manned structures, shall not use aluminium alloys 5083-H32, 5083-H38, 5086-H34, 5086-H38, 5456-H32 and 5456-H38 in applications where the temperature exceeds 66 °C. SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 12 4.2.3 Copper and copper alloys a. For electronic assemblies applications and wirings, materials and processes shall conform to the requirements from clause 5 to clause 15 of ECSS-Q-ST-70-08 and from clause 5 to clause 16 of ECSS-Q-ST-70-38. b. Copper coatings shall not be used on external surfaces exposed to atomic oxygen in the low Earth orbit. 4.2.4 Nickel and nickel alloys a. The effect of alloying element depletion at the surface of superalloys in high-temperature oxidizing environments shall be evaluated when sheet is used. NOTE A slight amount of depletion can involve a considerable proportion of the effective cross section of the material. b. Any foreign material which can contain sulphur, shall be removed prior to heat treatment or high temperature service. NOTE 1 Nickel and high nickel content alloys are susceptible to sulphur embrittlement. NOTE 2 Sulphur can be contained for example in oils, grease, and cutting lubricants as well as in air. 4.2.5 Titanium and Titanium alloys a. Hydrogen, Oxygen and Nitrogen uptake shall be avoided in all phases of the parts manufacturing or use. NOTE
1 The uptake of hydrogen during processes (with possible generation of hydrides) can occur for example on processes such as welding, cleaning and heat treatment. NOTE
2 The uptake of oxygen during processes (with possible generation of alpha cases) can occur for example during heat treatment, welding and Electro Discharge Machining. b. Titanium alloys whose hardenability is limited by section size shall not be used in dimensions which exceed their limits. c. Structural applications using titanium shall be designed to avoid fretting. d. For manned structures, titanium shall not be used with LOX or GOX at a pressure exceeding 34,5 kPa. e. For manned structures, titanium shall not be used with air where the oxygen partial pressure exceeds 34,5 kPa. f. The use of cleaning fluids and other chemicals that are detrimental to the performance of titanium or titanium alloy parts shall not come in contact with these metals. SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 13 4.2.6 Steels a. All high-strength heat treated parts which are acid cleaned, plated or exposed to other hydrogen-producing processes shall be subjected to a baking process. NOTE High-strength heat treated parts are > 1225 MPa UTS. b. Tempers of precipitation hardening steels that are susceptible to stress corrosion and hydrogen embrittlement shall not be used. c. Designs using precipitation hardening steels shall ensure the following:
1. controlled processing procedures are used, and 2. processing and procurement records are maintained for the reference. 4.2.7 Stainless steels a. Unstabilized austenitic steels shall not be used at temperatures above 370 °C. b. When using 400-series stainless steels the risk for hydrogen embrittlement, corrosion and stress corrosion cracking shall be controlled. c. Control means shall be presented for customer approval. 4.2.8 Filler metals: welding, brazing, soldering a. The selection of alloys to be welded and the selection of process techniques shall be in conformance with national or international aerospace specifications and standards approved by the customer. b. The fusion zone and the unmelted heat affected zone of a weld shall be accessible for inspection. c. All welds used for structural applications shall undergo 100 % radiographic inspection in conformance with specifications approved by the customer. d. All welds used for structural applications shall undergo a NDI program that shall be submitted for customer approval. NOTE ECSS-E-ST-32-01 contains additional requirements specific to welds used for Potential Fracture Critical Items applications. e. The capability of the equipment to meet the specified requirements, processes, welding supplies and supplementary treatments selected by the supplier shall be demonstrated through qualification testing of welded specimens representing the materials and joint configuration of production parts. f. The selection of brazing alloys and brazing techniques shall be in conformance with national or international aerospace specifications and standards approved by the customer. SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 14 g. Design shall include the effect of the brazing process on the strength of the parent metal. NOTE Base metal is the example of the parent metal. h. Subsequent fusion welding in the vicinity of brazed or soldered joints or other operations with high temperatures that affect the brazed or soldered joint shall not be performed. i. Soldered joints shall not be used for structural applications. j. Solders, process materials and procedures for electrical and electronic assembly shall conform to the requirements from clause 5 to clause 15 of ECSS-Q-ST-70-08 and from clause 5 to clause 16 of ECSS-Q-ST-70-38. 4.2.9 Miscellaneous metallic materials a. The supplier shall demonstrate that the selected Magnesium alloys are protected against corrosion effects with respect to the applicable environment. b. Hazards related to Magnesium alloys flammability during manufacturing shall be prevented. c. The supplier shall demonstrate that the selected Magnesium alloys are used in applications where risks of ignition are prevented. NOTE Examples of risk areas are those subjected to wear, abuse, foreign object damage, abrasion, erosion or at any location where fluid or moisture entrapment is possible. d. Alloys containing Beryllium higher than 4 % by weight shall not be used. e. The design of parts made of beryllium alloys shall include the material’s low impact resistance, notch sensitivity, its anisotropy and sensitivity to surface finish requirements. f. The application of refractory alloys shall be subjected to approval by the customer. NOTE Limited amount of data for structural assessment are available on these materials. g. Silver and Osmium coatings shall not be used on external surfaces of space systems exposed to atomic oxygen in low Earth orbit. h. Platings with open porosity shall be sealed. i. The selection of a superalloy for a given application shall be based on tests of the material in simulated in-service environments. j. Foreign material which contains sulphur shall be removed from superalloys prior to heat treatment or high-temperature service. NOTE Examples of materials that can contain sulphur are: oils, grease and cutting lubricants. k. The effect of alloying element depletion in superalloys at the surface in a high-temperature oxidizing environment shall be evaluated when sheet is used. SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 15 4.2.10 Optical materials a. The supplier shall demonstrate that the performances of the selected optical glasses or coatings are not degraded below the specified acceptable levels by ionizing radiation, particle, UV radiation and ATOX for the intended application. b. Use of glasses for the structural applications shall be in conformance with requirements 4.2.21a, 4.2.21b and 4.2.21c. c. When organic glasses are used, a radiation resistance assessment shall be performed. d. In assemblies incorporating optical materials, it shall be demonstrated that the difference in thermal expansion coefficients between the optical material and its mounting within the specified range of temperatures does not prevent to meet the design requirements. 4.2.11 Adhesives, coatings, varnishes a. The surfaces on which the adhesives, coatings or varnishes are applied shall be clean and dry prior to their application. b. Structural adhesive bonds in honeycomb panels shall attach the facings rigidly to the core to allow loads to be transmitted from one face to another. c. Adhesives, coatings and varnishes shall be physically and chemically compatible with the component parts of the finished assembly. NOTE This includes for example the adherends for adhesives, substrates and any other parts, such as materials used in the insulation or bodies of electronic components for coatings. d. Adhesives, coatings and varnishes shall be capable of accommodating dimensional changes resulting from temperature excursions without causing damage to the adhesive bond, or to other parts of the assembly. NOTE Electronic PCBs are example of other parts of the assembly. e. The supplier shall demonstrate that the mismatch of thermal expansion coefficients between adherends and adhesive or between substrates and coatings is within the design requirements. f. When acceptability of the mismatch of thermal expansion coefficients between adherends and adhesive is verified by test, the test procedure shall conform to the requirements of clause 5 of ECSS-Q-ST-70-04. g. When acceptability of the mismatch of thermal expansion coefficients between substrates and coatings is verified by test, the test procedure shall conform to the requirements of clause 5 of ECSS-Q-ST-70-04. h. Applications of thick coatings that can result in damage to the coated items shall be evaluated by testing. NOTE Resulting damage can be for example: high residual stresses, high temperatures during cure. SIST EN 16602-70-71:2016
EN 16602-70-71:2016 (E ) 16 i. Alkyd-, polyester- or polysulphide-type coatings shall not be used. j. Any compound that contains or releases corrosive media that can attack adjacent parts of the assembly shall be assessed for its potential risk. NOTE Examples of corrosive media are: acetic acid, ammonia, amines, hydrochloric and other acids. k. The supplier shall verify that the curing is affecting the whole surface of the bonded area when adhesives need atmospheric moisture as part of the curing process. NOTE This verification is even more important in case of non-porous or large surfaces.
l. The supplier shall demonstrate that solvents contained in coatings and varnishes have been removed prior to curing. NOTE Thinner is example of solvent. m. Adhesives, coatings and varnishes that are sensitive to moisture contamination shall only be used in controlled-humidity environments. n. Where void free application is used on coatings and varnishes the supplier shall apply a debubbling process, defined in a dedicated procedure. 4.2.12 Adhesive ta
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