This practice establishes the standard procedures for evaluating the resistance of pre-stressed prepainted metal panels to cracking and loss of adhesion, or both, after accelerated aging by boiling water. This method shall require the use of boiling water bath, 10x magnifier, adhesive tape or its equivalent, and deionized or other water as reagent.
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1.1 This practice can be used to evaluate the resistance of a pre-stressed prepainted metal panel to cracking and loss of adhesion, or both, after accelerated aging by boiling water. Most coil coated products are formed and bent into specific shapes to produce a final product. These operations introduce stresses, which may be relieved by cracking of the coating after aging.
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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D2794 Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact)
D4145 Test Method for Coating Flexibility of Prepainted Sheet
E643 Test Method for Ball Punch Deformation of Metallic Sheet Material
aging; bend; boiling water; coil; cracking; deformation; drawn metal; fabrication; flexibility; flowering; impact; pick-off; prepaint; stresses; tape-off; Aging; Aging resistance; Boiling water test; Prestressed prepainted metal;
ICS Number Code 19.040 (Environmental testing); 91.140.65 (Water heating equipment)
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