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Images of Inspection Equipment

Method of Test
1. Acid/alkaline-resistance test principle
Soak the sample in the acid/alkaline solution with a specified concentration for a certain period, and then take it out of the solution to assess the change of color and gloss, and whether it foams, sheds, etc.

2. Test of resistance to neutral salt mist principle
After expose the sample in the neutral Nacl mist for a specified time, assess the surface foaming and rusting, the outreach of surface corrosion, etc.

3. Air exposure test principle
Assess the loss of gloss, color change, chalking, foaming, rusting, cracking and other aging features of the coating membrane after the prepainted steel sheet aged for being exposed in the air.