Abrasion
Laboratory > Physicals
Abrasion resistance | |
It is called abrasion resistance to the ability of a material to resist mechanical actions such as rubbing, scraping, grinding, sandblasting or erosion that tends to progressively remove material from its surface. | |
Abrasimeter | |
Wear wheels produce the characteristic rubbing action. Mounted on a rotating surface, the samples are exposed to the friction action of two abrasive wheels. The wheels produce abrasion marks that form a model of crossed arches on a circular ring of approximately 30 cm2. This reveals the resistance to abrasion at all angles in relation to the wear or grain of the material. | |
Types of discs or abrasive wheels | |
The abrasion wheels, in general, are presented in 5 different levels of abrasivity. The felt wheels made of wool or simple rubber are used to test delicate materials or check the abrasiveness of materials such as dental powders. Wheels that incorporate abrasive particles in a tough rubber matrix or a vitrified clay matrix are indicated for more rigid materials. - Calibrase: a resistant wheel composed of abrasive particles of rubber and aluminum oxide. - Calibrade: a non-resistant wheel composed of abrasive particles of vitrified clay and silicon carbide. - Wool felt: does not contain abrasive particles. - Simple rubber: it does not contain abrasive particles unless it is used with sandpaper strips. - Tungsten Carbide: severe cutting and tearing action with helical teeth for use with resistant materials such as rubber, skins or flooring. | |
Abrasion in Martindale appliance Established by EN 388: 1994 standard to determine the abrasion resistance of protective gloves for work with mechanical risk. In some laboratories it is used to test materials for lining, tanned and synthetic. Taber Abrasimeter Used in leather goods, upholstery and uppers for sports and children's shoes. It is suitable for skins with very thick finish, type transfer. Discs of granulometry CS-10 and a suction system are used so that the powder does not interfere in the test. Norms : JIS K 5600-5-9 , JIS K 7204 , JIS K 6264 , JIS L 1096 , JAS , ASTM D 1044 |