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ASTM C756-87(2021)

(Test Method)

Standard Test Method for Cleanability of Surface Finishes

Standard Test Method for Cleanability of Surface Finishes

SIGNIFICANCE AND USE
4.1 This test method was developed to guide the user in selecting a finish coating or material that is resistant to soiling in a particular application.  
4.2 The numerical values derived by this test method enables the user to rank finish coatings and materials in regard to soil retention or ease of soil removal.
SCOPE
1.1 This test method covers the numerical evaluation of the ease or difficulty of cleaning soiled surface finishes. This test method is applicable to all surface finishes not affected by water.  
1.2 Values given in SI units are to be regarded as the standard. Inch-pound units are provided for information only.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Mar-2021
ICS
25.220.20 - Surface treatment
Technical Committee
B08 - Metallic and Inorganic Coatings
Drafting Committee
B08.12 - Materials for Porcelain Enamel and Ceramic-Metal Systems
Current Stage
Ref Project

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ASTM C756-87(2021) - Standard Test Method for Cleanability of Surface Finishes
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C756 − 87 (Reapproved 2021)
Standard Test Method for
1
Cleanability of Surface Finishes
This standard is issued under the fixed designation C756; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
This test provides a procedure to quantify the cleanability of acid-resistant porcelain enamel using
a fluorescent water-soluble soil in agent, a reproducible machine-wiping technique, and a means of
measuring the amount of residual soil by fluorescence.
1. Scope and then cleaning the surface with a reproducible machine-
wiping technique. The soil remaining on the specimen after
1.1 This test method covers the numerical evaluation of the
wipingisextractedwithawatersolventandthefluorescenceof
ease or difficulty of cleaning soiled surface finishes. This test
the solution measured. A standard reference surface is treated
method is applicable to all surface finishes not affected by
inasimilarmanner.Thecleanabilityindexofthesurfaceunder
water.
testisexpressedastheratioofthefluorescenceofthesolutions
1.2 Values given in SI units are to be regarded as the
extracted from the test surface and from the standard reference
standard. Inch-pound units are provided for information only.
surface. Cleanability indexes greater than 1.0 indicate that the
1.3 This standard does not purport to address all of the
test surface is more difficult to clean than the standard
safety concerns, if any, associated with its use. It is the
reference surface, while indexes less than 1.0 indicate that the
responsibility of the user of this standard to establish appro-
test surface is more easily cleanable than the standard of
priate safety, health, and environmental practices and deter-
comparison.
mine the applicability of regulatory limitations prior to use.
3.2 The soiling agent used consists of polyethylene glycol,
1.4 This international standard was developed in accor-
a black dye, and a fluorescent tracer, each of which is readily
dance with internationally recognized principles on standard-
water soluble.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Significance and Use
mendations issued by the World Trade Organization Technical
4.1 This test method was developed to guide the user in
Barriers to Trade (TBT) Committee.
selecting a finish coating or material that is resistant to soiling
2. Referenced Documents
in a particular application.
2
2.1 ASTM Standards:
4.2 The numerical values derived by this test method
C282 Test Method for Acid Resistance of Porcelain Enam-
enables the user to rank finish coatings and materials in regard
els(Citric Acid Spot Test)
to soil retention or ease of soil removal.
C614 Test Method forAlkali Resistance of Porcelain Enam-
5. Apparatus
els
5.1 Motor-Driven Lapping Plate, 203-mm (8-in.) diameter,
3. Summary of Test Method
3
speed 163 r/min.
3.1 The test method consists of applying an exact amount of
5.2 Automatic Polishing Unit, 11-s cycle, adjustable to
a fluorescent water-soluble soiling agent to a specimen surface
4
7
48-mm (1 ⁄8-in.) stroke.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeB08onMetallic 5.3 Hypodermic Syringe, glass, 2-mL capacity, without
and Inorganic Coatings and is the direct responsibility of Subcommittee B08.12 on
needle.
Materials for Porcelain Enamel and Ceramic-Metal Systems.
Current edition approved April 1, 2021. Published May 2021. Originally
3
approvedin1973.Lastpreviouseditionapprovedin2016asC756 – 87(2016).DOI: Suitable lapping plates are available from Buehler Ltd., 2120 Greenwood St.,
10.1520/C0756-87R21. Evanston, IL60204, Struers, Inc., 20102 Progress Drive, Cleveland, OH, 44136; or
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or other Metallurgical Supply Sources.
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM An Olsen “S.M.” Automatic Polisher has been found suitable and is available
Standards volume information, refer to the standard’s Document Summary page on under the code name OLPOL from Struers, Inc., 20102 Progress Drive, Cleveland,
the ASTM website. OH 44136.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C756 − 87 (2021)
5.4 Repeating Pipet, 0.025 mL (25 µl) capacity. 6. Reagents and Materials
5.5 Repeating Pipet, 10-mL capacity.
...

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5.1 The CEDI devices can be used to produce deionized water from feeds of pretreated water. This test method permits the relatively rapid measurement of key performance capabilities of CEDI devices using standard sets of conditions. The data obtained can be analyzed to provide information on whether changes may have occurred in operating characteristics of the device independently of any variability in feed water characteristics or operating conditions. Under specific circumstances, this test method may also provide sufficient information for plant design.
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ABSTRACT
This specification covers zinc and tin alloy wire, including zinc-aluminum, zinc-aluminum-copper, zinc-tin, zinc-tin-copper an dtin-zinc, used as thermal spray wire in the electronics industry. The wire shall conform to the required chemical composition for cadmium, zinc, tin, lead, antimony, copper, aluminum, bismuth, arsenic, iron, nickel, and magnesium. The wire shall be clean and free of corrosion, adhering foreign material, scale, seams, nicks, burrs, and other defects which would interfere with the operation of thermal spraying equipment. The wire shall uncoil readily and be free of bends or kinks that would prevent its passage through the thermal spray gun. Sampling methodology should ensure that the sample slected for testing is representative of the matreial. The diameter of the wire shall be determines at the end and the beginning of each continuous wire.
SCOPE
1.1 This specification covers zinc and tin alloy wire, including zinc-aluminum, zinc-aluminum-copper, zinc-tin, zinc-tin-copper and tin-zinc, used as thermal spray wire in the electronics industry.  
1.1.1 Certain alloys specified in this standard are also used as solders for the purpose of joining together two or more metals at temperatures below their melting points, and for other purposes (as noted in Annex A1). Specification B907 covers Zinc, Tin and Cadmium Base Alloys Used as Solders which are used primarily for the purpose of joining together two or more metals at temperatures below their melting points and for other purposes (as noted in the Annex part of Specification B907). Specification B833 covers Zinc and Zinc Alloy Wire for Thermal Spraying (Metallizing) used primarily for the corrosion protection of steel (as noted in the Annex part of Specification B833).  
1.1.2 Tin base alloys are included in this specification because their use in the electronics industry is similar to the use of certain zinc alloys but different than the major use of the tin and lead solder compositions specified in Specification B32.  
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SIGNIFICANCE AND USE
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5.4 For quantitative measurement of surface wetting, test methods that measure contact angle of a sessile drop of water or other test liquid may be used in some applications. Measurement methods based on contact angle are shown in Test Methods C813, D5946, and D7490; and Practice D7334.  
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5.5 For surfaces that cannot be immersed or doused with water, or where such immersion or dousing is impractical, such as previously coated large parts or assemblies, prior to the application of paints, primers or other organic coatings, Test Method F21 may be better suited for the evaluation of surface cleanliness than this test method.
Note 2: This test method is not appropriate where line o...
SCOPE
1.1 This test method covers the detection of the presence of hydrophobic (nonwetting) films on surfaces and the presence of hydrophobic organic materials in processing environments. When properly conducted, the test will enable detection of molecular layers of hydrophobic organic contaminants. On very rough or porous surfaces, the sensitivity of the test may be significantly decreased.  
1.2 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.  
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