Thermal diffusion sherardizing is widely used by its good rust-resistance, whichwas developed as a new metal surface disposal technology at beginning of last century.

This paper analyzes the main effects of process on sherardizing of iron-base powder metallurgic parts,researches properties of zinc coat and make choice of useful technolgi- cal parameter.

Surface nanocrystallization has been used in many aspects as a new way of suface treatment technology,especially in reducing temperature and time of sherardizing.

Corrosion resistance of zinc impregnation and dacromet coating was studied by environmental corrosion test and electrochemical measurement techniques.