The ISO 7784-2 standard describes a technique for assessing coatings’ resistance to abrasion in which the coating of a rotating test specimen is affected by two loaded, freely rotatable, but eccentrically positioned abrasive rubber wheels.

The following sections make up ISO 7784‘s general title, Paints and Varnishes. — Determining abrasion resistance:

— Part 1: A method using spinning test specimens and wheels covered in abrasive paper

— Part 2: Method using rotating test specimens and rough rubber wheels

— Part 3: A technique using a wheel covered with abrasive paper and a linearly reciprocating test specimen

The revolving test specimen’s coating is pressed against by two predetermined, pivot-mounted abrasive rubber wheels while being subjected to the predetermined test load. A ring-shaped zone experiences crosswise abrasive wear due to the eccentric arrangement of the abrasive wheel axes in relation to the axis of rotation. After the agreed-upon number of cycles, the amount of mass lost by abrasive wear in the coating is calculated.

NextGen’s Taber Abrasion Tester complies with ISO 7784-2 standard.

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