中国化学工程学报(英文版)
中國化學工程學報(英文版)
중국화학공정학보(영문판)
CHINESE JOURNAL OF CHEMICAL ENGINEERING
2008年
2期
314-319
,共6页
吕国诚%程海东%许淳淳%何宗虎
呂國誠%程海東%許淳淳%何宗虎
려국성%정해동%허순순%하종호
304 stainless steel%strain%pitting corrosion%chloride concentration
The effects of strain and chloride concentration on pitting susceptibility for type 304 stainless steel were studied in situ using the electrochemical technology under constant strain. The impact factor fε was brought forward to value the effect of strain on pitting. The pitting behaviors of type 304 stainless steel in various chloride concen- trations under the strain levels 0%, 10%, and 30% were investigated. Potentiostatic polarization technology was used to study how the chloride concentration affected corrosion current density. The results indicated thatr fε in- creased substantially and pitting potential varied remarkably when chloride concentration was over 90 mg·L-1 Un- der the three levels of strain mentioned above, when chloride concentration was below 463 mg·L-1 ,121 mg·L-1, and 98 mg·L-1, respectively, the pitting potential shifted towards positivity and, the passive film became more stable.When the strain was below 10%, the pitting susceptibility of type 304 stainless steel varied greatly as strain in-creased, whereas the susceptibility only changed a little when the strain was over 10%.