ASTM D4145 PDF

ASTM D(). Standard Test Method for Coating Flexibility of Prepainted Sheet. standard by ASTM International, 09/01/ View all product details. Standard Test Method for Coating Flexibility of Prepainted Sheet – ASTM D . Hide. Search. Start. Standard ASTM standard · ASTM D This professional T-Bend Tester is designed and engineered in accordance with international test standard, e.g. ASTM D (Standard Test Method for.

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ASTM D Elasticity refers to the flexibility of the paint film when the metal sheet is subjected to satm bending. Some of the colors are metameric, and are considered suitable only after being analyzed using this machine. The “T”-bend test is a very important test for ensuring the adhesion of the paint film during critical bending of the metal sheet. NOTE 1—The above bends are expanded for clarity.

Standard Test Method for Coating Flexibility of Prepainted Sheet

This is a paint property that can be varied by the addition of matting agents or dulling agents during paint manufacture. A superscript epsilon indicates an editorial change since the last revision or reapproval. This is an accelerated corrosion test for organic coatings.

Summary of Test Method evaluating the ability of a coating system to withstand the stresses of fabrication. Your comments will receive careful consideration at a xstm of the responsible technical committee, which you may attend.

This test is performed using the organic solvent methyl ethyl ketone. The reverse impact test is a destructive test. This is a very important color assessment test.

Standard samples and the test sample are positioned side by side and analyzed for shade variations. The results of this test indicates the degree of curing of the paint film. It is asrm responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Aatm salt performed in a salt spray cabinet. The values given in parentheses are for information only. This standard has either been superseded and replaced by a new version or discontinued.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.

ASTM D – 10() Standard Test Method for Coating Flexibility of Prepainted Sheet

ASTM D The “T”-bend test is a very important test for ensuring the adhesion of the paint film during critical bending of the metal sheet. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement asmt such rights, are entirely their own responsibility.

Examine the tape for coating removed from the surface of the specimen that is, pickoff. A “0” T bend is the most critical and 5 T is less critical. Surface gloss relates to the light reflectance from a painted surface.

Elasticity refers to the flexibility of the paint film when the metal sheet is subjected to radius bending. The elasticity is measured with the aid of an eye piece after wstm an image of the paint surface. It is the responsibility of the user of this standard to establish appro- priate safety and health practices and determine the applica- bility of regulatory limitations prior to use.

Prepainted Steel Test

A 2 by 6-in. Reverse Impact Test Standard: In the case of a coated steel specimen for example, galvanized steelexamine the tape to FIG. This test is a means of 3.

The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. The gloss levels include low gloss, medium gloss, and high gloss. The force will vary according to the thickness of the sheet.

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Visual Color Test Standard: Paul, MN or equivalent, Current edition approved March 25, The bend direction, whether the axis of bend is transverse to or along the rolling direction of the metal, and the temperature of the specimen when it is bent can affect the results of this test and should be agreed upon between the supplier and the user.

A greater solvent resistance indicates that the paint film is more stable and durable for outdoor exposure.

Standard – Standard Test Method for Coating Flexibility of Prepainted Sheet ASTM D –

The paint film should not crack while bending the metal. This test is a means of evaluating the ability of a coating system to withstand the stresses of fabrication. The stability aastm the coating is measured by applying tape on the reverse direction of the impact area.

Continue to bend the free end around the testing. The associated energy transfer will result in loosening of the paint film. This test involves dropping a mass of about 2 kg from a height of about 70 cm, thereby exerting a falling force of 13 Joules. Pencil Hardness Test Standard: Organic coatings on precoated sheet are subjected to stresses when fabricated into products by roll forming, brake bending, or other deformation processes.

A noncured paint film has a lower pencil hardness, which makes it more likely to be damaged.