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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Some of the colors are metameric, and are considered suitable only after being analyzed using this machine. It is the responsibility of the user of this standard to establish appro- priate safety and asrm practices and determine the applica- bility of regulatory limitations prior to use. ASTM D Elasticity refers to the flexibility of the paint film when the metal sheet is subjected to radius bending.

This is an accelerated corrosion test for organic coatings. This shape leaves a portion of d41445 bend a smooth and uniform manner.

ASTM D – 83 Rpdf全文-调研报告-在线文档

Surface Gloss Test Standard: Surface gloss relates to the d4415 reflectance from a painted surface. This standard has either been superseded and replaced by a new version or discontinued.

Continue to bend the free end around the testing. Both salt performed in a salt spray cabinet.

The values given in parentheses are for information only. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

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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. This is a paint property that can be varied by the addition of matting agents or dulling agents during paint manufacture.

The values given f4145 parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

This ast, a very important color assessment test. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.

Prepainted Steel Test

The paint film should not crack while bending the metal. Salt R4145 Test Standard: Organic coatings on precoated sheet are subjected to stresses when fabricated into products by roll forming, brake bending, or other deformation processes. Examine the tape for coating removed from the surface of the specimen that is, pickoff.

These stresses can exceed the flexibility or adhesive strength of the coating, resulting in fracture of the coating which exposes the substrate, or in the loss of adhesion of the coating to the substrate.

The pencil hardness test is used to measure the hardness of the paint film. The solvent resistance test indicates the stability of a paint film exposed to organic solvents.

ASTM D – 83()e1 Standard Test Method for Coating Flexibility of Prepainted Sheet

This test is a means of 3. A number in parentheses indicates the year of last reapproval. Pencil Hardness Test Standard: The stability of the coating is measured by applying tape on the reverse direction of the impact area.

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Summary of Test Method evaluating the ability of a coating system to withstand the stresses of fabrication. This makes a 1T bend Fig. A noncured paint film has a lower pencil hardness, which makes it more likely to be damaged. This test is a means of evaluating the ability of a coating system to withstand the stresses of fabrication.

Standard Test Method for Coating Flexibility of Prepainted Sheet

The results of this test indicates the degree of curing of the paint astmm. NOTE 1—The above bends are expanded for clarity. Standard samples and the test sample are positioned side by side and analyzed for shade variations.

The elasticity ashm measured with the aid of an eye piece after magnifying an image of the paint surface. Elasticity refers to the flexibility of the paint film when the metal sheet is subjected to radius bending. A greater solvent resistance indicates that the paint film is more stable and durable for outdoor exposure.

Visual Color Test Standard: