Study on Acid-resistant Erode Capability for Plasma Spray Ni and Cr Coat
Abstract：The technology of plasma spray was used to make Ni and Cr coat on the surface of Q235, and E-44 epoxy and low-molecule 650 Polyamide with the 1：1 proportion was used to seal the hole. The acid-resistant erode capability of the coat was evaluated throughout three kinds strong acid dip in test. The results show that Ni and Cr coat still has its smooth surface after dip in 500 hours in 65 % nitric acid and 98% vitriol acid liquid. The density of coat is very good,but there are a small quality of erode pit under SEM microscope. And the rate of erode is 0.05 - 0.5 mm/a, and belongs to second level. After dip in 500 hours in 36% hydrochloric acid, the proportion coat of the surface of the part breaks off because of influence of active hydronium Cl^ - under SEM microscope, and belongs to third level. The acid-resistant erode capability is not good.
Keywords：plasma spraycoatacid-resistant erode capability
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 44-47 )