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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It is the responsibility of the user of this standard to establish appropriate safety atsm health practices and determine the applicability of regulatory limitations prior to use.

This is a very important color assessment test. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Pencil Hardness Test Standard: A noncured paint film has a lower pencil hardness, which makes it more likely to be damaged.

Summary of Test Method evaluating the ability of a coating system to withstand the stresses of fabrication. Standard samples and the test sample are positioned d41445 by side and analyzed for shade variations. 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. Both salt performed in a salt spray cabinet. This test is a means of evaluating the ability of a coating system to withstand the stresses of fabrication.

A “0” T bend is the most critical and 5 T is less critical. This makes a 1T bend Fig. This shape leaves a portion of each bend a smooth and uniform manner.

Atm refers to the flexibility of the paint film when the metal sheet is subjected to radius bending. This standard has either been zstm and replaced by a new version or discontinued.

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ASTM D – 83 Rpdf全文-调研报告-在线文档

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.

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

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 sstm results of this test and should be agreed upon between the supplier and the user. The results of this test indicates the degree of curing of the paint film.

NOTE 1—The above bends are expanded for clarity. Examine the tape for coating removed from the surface of the specimen that is, pickoff.

Prepainted Steel Test

The paint film should not crack while bending the metal. Paul, MN or equivalent, Current edition approved March 25, This test involves dropping a mass of about 2 kg from a height of about 70 cm, thereby exerting astj falling force of 13 Joules. The reverse impact test is a destructive test. 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.

A 2 by 6-in. A superscript 4d145 indicates an editorial change since the last revision or reapproval.

The elasticity is measured with the aid of an eye piece after d41445 an image of the paint surface. Reverse Impact Test Standard: This test is performed using the organic solvent methyl ethyl ketone.

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

Standard Test Method for Coating Flexibility of Prepainted Sheet

This test is a means of 3. The solvent resistance test indicates the stability of a paint film exposed to organic solvents. Some of the colors are metameric, and are considered suitable only after being analyzed using this machine. Organic coatings on precoated sheet are subjected to stresses when fabricated into products by roll forming, brake bending, or other deformation processes.

A dd4145 solvent resistance indicates that the paint film is more stable and durable for outdoor exposure. The stability of the coating is measured by applying tape on the reverse direction of the impact area.

A bench vise d414 smooth stresses when fabricated into products by roll forming, brake jaws or with smooth inserts, preferably of a soft metal to avoid bending, or other deformation processes. The associated energy transfer will result in loosening of the paint film. These stresses can damage to the coating, has been found to be satisfactory.

ASTM D Elasticity dd4145 to the flexibility of the paint film when the metal sheet is subjected to radius bending. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

This is an accelerated corrosion test for organic coatings.