Effects of pickling and phosphating on properties of coatings sprayed on neodymium-iron-boron magnet surface.

Autor: TANG Guocai, QUE Yongsheng, ZHOU Xiaoqing, LIU Guanwei, HUANG Shihao
Předmět:
Zdroj: Electroplating & Finishing; 2022, Vol. 41 Issue 18, p1294-1298, 5p
Abstrakt: In order to develop an environment-friendly and highly efficient anticorrosive coating process for neodymium-- iron--boron magnet, the effect of pretreatment (i.e. pickling only or pickling prior to phosphating) of neodymium--iron-- boron magnet on the adhesion of nano-coating sprayed to it and the corrosion of nano-coating to corrosion, aging, and thermal shock was compared by copper-accelerated acid salt spray (CASS) test, pressure cooker test (PCT), thermal shock test, and cross-cut test. The results showed that the coating sprayed on the substrate pretreated with different processes had equivalent thermal shock resistance and adhesion, while the coating sprayed on the substrate pickled only showed better resistance to corrosion and aging than that sprayed on the substrate pretreated by combination of pickling and phosphating. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index