1 Scope
This standard is one of a series of standards dealing with the sampling and testing of paints, varnishes and related products.
This standard specifies a method for determining the resistance to abrasion of a dried film of paint, varnish or related product, using abrasive rubber wheels and abrading by making a rotary movement.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. 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 9271-1988, eqv ISO 1514:1984)
GB/T 13452.2 Paints and Varnishes — Determination of Film Thickness (GB/T 13452.2-1992, eqv ISO 2808:1974)
GB/T 20777 Paints and Varnishes — Examination and Preparation of Samples for Testing (GB/T 20777-2006, ISO 1513:1992, IDT)
3 Principle
A dried paint or varnish film is abraded, under specified conditions, with abrasive rubber wheels which are attached to an abrasion testing machine. During the test the wheels are loaded with specified weights. The resistance to abrasion is calculated as the loss in mass after a specified number of abrasion cycles or as the number of cycles required to remove the coating down to the next layer or down to the substrate.
