Technical Guidance and Application Method of Metal Paint Scratch Tester

Shanghai Chengwei complies with relevant standards of ISO 1518, BS 3900, ASTM D 5178 and ASTM D 2197. The scratch tester can test the scratch resistance of product surface coatings, such as coil paint, tin ink, metal paint, automobile surface coating, etc. The scratch tester is suitable for evaluating the surface scratch resistance of single coating or composite coating of color coated plate. The scratch resistance of the coating is evaluated by the load of the coating scratched by the spherical steel needle or the coating not scratched by the spherical steel needle under a certain weight. During the scratch tester test, use a hemispherical scratch needle with a diameter of 1mm to slowly contact the measured surface and scratch a 10cm long scratch. Depending on the test purpose and the loaded load, different degrees of penetration can be observed, from surface trace to complete penetration. The motor drives the sample to slightly contact with the scratch needle. The scratch needle crosses the sample and stops automatically after reaching the end point. The contact between the scratch needle and the metal substrate is identified by a voltmeter. When the coating of the tested sample is scratched, the ammeter shows that there is current passing through.

weight: one for 1000g / 500g / 200g and two for 100g / 50g

diameter of needle steel ball: 1mm

net weight of instrument: 30kg

Speed regulating scratch tester   Application of paint film scratch tester

Film strength, hardness and adhesion are important physical properties of the film, and their size directly affects the important performance of the film, such as wear resistance; Abrasion resistance; Scratch resistance; Impact resistance, retention effect and cleaning difficulty of the film, so film strength and hardness are the necessary indexes to evaluate the performance of the coating. This instrument can be used to comprehensively evaluate the physical properties such as film strength, hardness and adhesion. Therefore, the purpose of this instrument is to characterize the strength, hardness and adhesion of the coating through the anti penetration ability of the paint film template coating when it is scribed by the scriber.

The instrument is a special equipment developed for the implementation of gb9279, which is the condition for the implementation of the national standard.

2 Speed regulating scratch tester   Working principle of paint film scratch tester

The instrument is mainly composed of a scratch needle frame and a workbench. The scratch needle on the scratch needle frame ensures that it acts vertically on the film template (the template is fixed on the test bench on the workbench and can be moved laterally or longitudinally;).

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