ASTM D3260-01(2023)

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: D3260 − 01 (Reapproved 2023)
Standard Test Method for
Acid and Mortar Resistance of Factory-Applied Clear
Coatings on Extruded Aluminum Products
This standard is issued under the fixed designation D3260; 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 4. Significance and Use
4.1 This test method will provide differentiation between
1.1 This test method covers the evaluation of the mortar and
types of coatings for acid and motor resistance providing the
acid resistance of clear protective coating factory applied to
coating is applied in a uniform continuous film with a specified
extruded aluminum substrates.
film thickness.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
5. Reagents
only.
5.1 Acid—Ten volume percent solution of commercial grade
1.3 This standard does not purport to address all of the
hydrochloric acid (31.4 % to 31.8 % HCl, 20°Bé) in distilled
safety concerns, if any, associated with its use. It is the
water.
responsibility of the user of this standard to establish appro-
5.2 Cleaning Solution—An alkaline cleaner in the concen-
priate safety, health, and environmental practices and deter-
tration recommended by the manufacturer, usually 45 g ⁄L to 60
mine the applicability of regulatory limitations prior to use.
g/L (6 oz ⁄gal to 8 oz/gal) of water. The pH of the solution
1.4 This international standard was developed in accor-
should be between 11.4 and 12.2.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 5.3 Lime—Building lime complying with Specification
C207.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5.4 Neutralizing Solution—Prepare from a stable free-
Barriers to Trade (TBT) Committee.
flowing, granular material having a chromate base as recom-
mended by the supplier, usually at a concentration of 90 g ⁄L to
2. Referenced Documents
120 g/L (12 oz ⁄gal to 16 oz/gal) of water.
2.1 ASTM Standards:
5.5 Sand—Dry sand capable of passing through a 10-mesh
C207 Specification for Hydrated Lime for Masonry Pur-
wire screen.
poses
D823 Practices for Producing Films of Uniform Thickness
6. Test Panels
of Paint, Coatings and Related Products on Test Panels
6.1 Panels of extruded aluminum alloy No. 6063-T5 with
dimensions 150 mm by 75 mm by 6.3 mm (6 in. by 3 in. by ⁄4
3. Summary of Test Method
in.) shall be used for the test.
3.1 Panels that have been buffed, cleaned, neutralized, and
coated with the material being evaluated are exposed to freshly 7. Procedure
prepared mortar and to a hydrochloric acid solution.
7.1 Preparation of Test Panels:
7.1.1 Buff the aluminum panels and remove the buffing
compound with an organic solvent.
This test method is under the jurisdiction of ASTM Committee D01 on Paint 7.1.2 Immerse the panels in cleaning solution (5.2) for 1 h at
and Related Coatings, Materials, and Applications and is the direct responsibility of
a temperature of 93 °C (200 °F).
Subcommittee D01.55 on Factory Applied Coatings on Preformed Products.
7.1.3 Rinse the panels in tap water having a pH of 6.5 to 7.5
Current edition approved June 1, 2023. Published June 2023. Originally
until the surface is free of water break. Use reagent water for
approved in 1982. Last previous edition approved in 2017 as D3260 – 01 (2017).
DOI: 10.1520/D3260-01R23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Diversey No. 808 has been found satisfactory for this purpose.
the ASTM website. Diversey No. 814 has been found satisfactory for this purpose.
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