Abstract: Abstract:According to the rust prevention requirement of the pipes of rotating electric machines in nuclear power stations, a detailed phosphating technology process was developed.The problems occurred in implement of the technology process, such as the overetching, the unevenness of phosphating film and the rerust after phosphorization, were researched experimentally, and the optimal proportion of the acid washing liquid and the best phosphorization agent were obtained. The problem of rerust after phosphorization was solved. The results in this paper provide reference for phosphating of similar equipments in nuclear power stations.

Key words: Keywords:nuclear power station, acid pickling, phosphorization, phosphating film, overetching