Abstract：The mechanism of P-RE combined action improving atmospheric corrosion resistant performance of iron and steel material was studied. The Rust layers of experimental steels were made by using an accelerating industrial atmospheric corrosion test of dry-wet cyclic immersion. Furthermore XRD were used to measure and analyze rust layers. Under thin water film, the initial corrosion processes of experimental steels were observed and the changes of micro-area PH value of experimental steels were measured. The results are as follows: P-RE combined action promotes the formation of α-FeOOH. P-RE combined action changes properties of inclusion, affects the change of PH value, influences the process of corrosion and promotes the formation of protective rust
2010, Vol. 45 
