This standard specifies the determination methods for abrasion resistance of single-layer or multi-layer coating of paints, varnishes or relevant products.
This test method applies to determination for abrasion resistance of single-layer or multi-layer coating of paints, varnishes or relevant products by falling abrasive on the coating. The abrasion resistance is expressed by the quantity of abrasive necessary for wearing the coating per unit of thickness.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 3186 Paints, Varnishes and Raw Materials for Paints and Varnishes—Sampling (GB/T 3186-2006, ISO 15528:2000, IDT)
GB/T 9271 Paints and Varnishes—Standard Panels for Testing (GB/T 9271-2008, ISO 1514:2004, MOD)
GB/T 13452.2 Paints and Varnishes—Determination of Film Thickness (GB/T 13452.2-2008, IS0 2808:2007, IDT)
GB/T 20777 Paints and Varnishes—Examination and Preparation of Samples for Testing (GB/T 20777-2006, IS0 1513:1992, IDT)
3 Apparatus and Materials
3.1 Abrasion tester, as shown in Figure 1, equipped with a switch for controlling abrasive flow near the top of the pipe. It is consists of a metal disc that is inserted into the narrow slit on one side of the pipe with a lantern ring covering the slit. The pipe is firmly and vertically placed on the upper part of an appropriate vessel. The equipment shall have a bracket at an included angle of 45° with the vertical position for holding the coating template. The pipe opening shall be dead against the upward side of the area under abrasion. The distance from the pipe to the coating surface shall be 25.4mm as a minimum when measured vertically. The apparatus shall be equipped with adjusting screws at the bottom for the convenience of appropriately adjusting device
