ASTM G33-99(2015)

Standard Practice for Recording Data from Atmospheric Corrosion Tests of Metallic-Coated Steel Specimens

SIGNIFICANCE AND USE
3.1 Use of this practice will maximize the benefits to be gained from atmospheric testing of metallic-coated steel. It will also aid in comparing results from one location to another where similar tests have been conducted.
SCOPE
1.1 This practice covers a procedure for recording data of atmospheric corrosion tests of metallic-coated steel specimens. Its objective is the assurance of (1) complete identification of materials before testing, (2) objective reporting of material appearance during visual inspections, and (3) adequate photographic, micrographic, and chemical laboratory examinations at specific stages of deterioration, and at the end of the tests.  
1.2 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Oct-2015
• ICS: 77.060 - Corrosion of metals
• Technical Committee: G01 - Corrosion of Metals
• Drafting Committee: G01.04 - Corrosion of Metals in Natural Atmospheric and Aqueous Environments

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: G33 − 99 (Reapproved 2015)
Standard Practice for
Recording Data from Atmospheric Corrosion Tests of
1
Metallic-Coated Steel Specimens
This standard is issued under the fixed designation G33; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Data to be Recorded Before Testing
1.1 This practice covers a procedure for recording data of
4.1 Material Characteristics:
atmospheric corrosion tests of metallic-coated steel specimens.
4.1.1 Coating and Basis Metal:
Its objective is the assurance of (1) complete identification of
4.1.1.1 Type of coating (zinc, aluminum, nickel-chromium,
materials before testing, (2) objective reporting of material
and so forth).
appearance during visual inspections, and (3) adequate
4.1.1.2 Method of application (hot-dip, electroplated,
photographic, micrographic, and chemical laboratory examina-
electroless, mechanical plated, and so forth),
tions at specific stages of deterioration, and at the end of the
(1) Area coated (if not 100 % of surface),
tests.
(2) Pre-treatment (basis metal: flux, sand-blast, and so
forth), and
1.2 This standard does not purport to address all of the
(3) Post-treatment (heating, sealing, and so forth),
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 4.1.1.3 Coating composition,
4.1.1.4 Basis metal product.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. (1) Basis metal composition, and
(2) Metallurgical history prior to coating (if any).
2. Referenced Documents
4.1.1.5 Chemical treatment of coating.
2
4.1.1.6 Black and white photograph of typical surface area
2.1 ASTM Standards:
illustrating texture (1:1 magnification ratio).
A90/A90M Test Method for Weight [Mass] of Coating on
4.1.1.7 Micrograph of typical coating cross section (magni-
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
fication and etchant to be specified).
A428/A428M Test Method for Weight [Mass] of Coating on
4.1.2 Coating Weight and Thickness:
Aluminum-Coated Iron or Steel Articles
E376 Practice for Measuring Coating Thickness by 4.1.2.1 Weight by stripping. (See Test Method A90/A90M
Magnetic-Field or Eddy-Current (Electromagnetic) Test- or A428/A428M.)
ing Methods
(1) Method.
G46 Guide for Examination and Evaluation of Pitting Cor-
4.1.2.2 Measured Thickness.
rosion
(1) Method (for example, eddy current, back scattering,
magnetic),
3. Significance and Use
NOTE 1—If a magnetic type instrument is used, refer to Practice E376.
3.1 Use of this practice will maximize the benefits to be
(2) Number of determinations,
gainedfromatmospherictestingofmetallic-coatedsteel.Itwill
(3) Mean,
also aid in comparing results from one location to another
(4) Standard deviation, and
where similar tests have been conducted.
(5) Range (spread of determinations).
4.2 Specimen Identification and Exposure Location:
1 4.2.1 Marking (method to be specified).
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion
of Metals and is the direct responsibility of Subcommittee G01.04 on Atmospheric
4.2.2 Specimen position in test area.
Corrosion.
4.2.3 Angle of exposure from horizontal.
Current edition approved Nov. 1, 2015. Published November 2015. Originally
4.2.4 Direction of specimen faces.
approved in 1972. Last previous edition approved in 2010 as G33–99(2010). DOI:
10.1520/G0033-99R15.
4.2.5 Location of test area.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.2.6 Description of test area (location of nearby industry,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
ocean,andsoforth,andrecordeddataonspecificcontaminants
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. where possible).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
G33 − 99 (2015)
4.2.7 Exposure starting date: (2) Peeling—Separation of the coating from the substrate
initiating at an edge of or cut in the coating and causing an
4.2.7.1 Weather conditions (for example, bright, cloudy,
exposure of the substrate,
sunshine, rain, and so forth),
(3) Cracking—Any fissure in the coating other than a
4.3 Specimen Characteristics:
mechanical cut,
4.3.1 Description (sheet, wire, hardware, and so forth).
(4) Checking—Cracking in a cross-hatch manner resem-
4.3.2 Specimen size:
bling mud cracking,
4.3.2.1 Specimen surface dimensions.
(5) Rust—Corrosion pro
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: G33 − 99 (Reapproved 2010) G33 − 99 (Reapproved 2015)
Standard Practice for
Recording Data from Atmospheric Corrosion Tests of
1
Metallic-Coated Steel Specimens
This standard is issued under the fixed designation G33; 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.
1. Scope
1.1 This practice covers a procedure for recording data of atmospheric corrosion tests of metallic-coated steel specimens. Its
objective is the assurance of (1) complete identification of materials before testing, (2) objective reporting of material appearance
during visual inspections, and (3) adequate photographic, micrographic, and chemical laboratory examinations at specific stages
of deterioration, and at the end of the tests.
1.2 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
A90/A90M Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
A428/A428M Test Method for Weight [Mass] of Coating on Aluminum-Coated Iron or Steel Articles
E376 Practice for Measuring Coating Thickness by Magnetic-Field or Eddy-Current (Electromagnetic) Testing Methods
G46 Guide for Examination and Evaluation of Pitting Corrosion
3. Significance and Use
3.1 Use of this practice will maximize the benefits to be gained from atmospheric testing of metallic-coated steel. It will also
aid in comparing results from one location to another where similar tests have been conducted.
4. Data to be Recorded Before Testing
4.1 Material Characteristics:
4.1.1 Coating and Basis Metal:
4.1.1.1 Type of coating (zinc, aluminum, nickel-chromium, and so forth).
4.1.1.2 Method of application (hot-dip, electroplated, electroless, mechanical plated, and so forth),
(1) Area coated (if not 100 % of surface),
(1) Area coated (if not 100 % of surface),
(2) Pre-treatment (basis metal: flux, sand-blast, and so forth), and
(3) Post-treatment (heating, sealing, and so forth),
(2) Pre-treatment (basis metal: flux, sand-blast, and so forth), and
(3) Post-treatment (heating, sealing, and so forth),
4.1.1.3 Coating composition,
4.1.1.4 Basis metal product.
(1) Basis metal composition, and
(1) Basis metal composition, and
(2) Metallurgical history prior to coating (if any).
1
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion of Metals and is the direct responsibility of Subcommittee G01.04 on Atmospheric
Corrosion.
Current edition approved May 1, 2010Nov. 1, 2015. Published May 2010November 2015. Originally approved in 1972. Last previous edition approved in 20042010 as
G33–99(2004).G33–99(2010). DOI: 10.1520/G0033-99R10.10.1520/G0033-99R15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
G33 − 99 (2015)
(2) Metallurgical history prior to coating (if any).
4.1.1.5 Chemical treatment of coating.
4.1.1.6 Black and white photograph of typical surface area illustrating texture (1:1 magnification ratio).
4.1.1.7 Micrograph of typical coating cross section (magnification and etchant to be specified).
4.1.2 Coating Weight and Thickness:
4.1.2.1 Weight by stripping. (See Test Method A90/A90M or A428/A428M.)
(1) Method.
4.1.2.2 Measured Thickness.
(1) Method (for example, eddy current, back scattering, magnetic),
(1) Method (for example, eddy current, back scattering, magnetic),
NOTE 1—If a magnetic type instrument is used, refer to Practice E376.
(2) Number of determinations,
(3) Mean,
(4) Standard deviation, and
(5) Range (spread of determinations).
NOTE 1—If a magnetic type instrument is used, refer to Practice E376.
(2) Number of determinations,
(3) Mean,
(4) Standard deviation, and
(5) Range (spread of determinations).
4.2 Specimen Identification and Exposure Location:
4.2.1 Marking (method to be spe
...