Abstract：This paper was based on the media of 10% NaCl solution whose pH was 0.85，and the effect of sulphur content，the non-metallic inclusion on the corrosion behavior were studied. Results indicated that sulphur shows negative effect for the corrosion resistance of steel. The pitting resistance worse with sulphur content increases，which is mainly attribute to the non-metallic inclusions in steel. There is significant difference for the mechanism of pitting initiation between different kinds of inclusions. A micro-gap exists between substrate and single MnS inclusions，the pitting initiation processes of MnS contains the crevice corrosion and the dissolution of inclusions，MnS were seen to be the most sensitive inclusion to pitting corrosion; The pitting corrosion also can be induced by MXS-Al2O3 composite inclusions，MxS which wrapped in the outer layer of Al2O3 dissolved preferentially，and which become the channels of corrosive media，then causing localized corrosion. The pitting nucleation sensitivity of MnS-Al2O3 is greater than CaS-Al2O3 inclusions. Ca treatment is an effective way to improve the resistance of localized corrosion. CaS is prone to hydrolysis in water and the formation of OH- around the inclusions hinders the acidification in the pit，and is beneficial to restrain the local corrosion resistance of the steel.
李 丽，罗小兵，柴 锋，苏 航. 硫质量分数对船体钢诱发点蚀行为的影响研究[J]. 中国钢铁期刊网, 2017, 36(2): 7-16.
Li Li，LUO Xiao-bing，CHAI Feng，SU Hang. Effect of sulfur on pitting corrosion behavior of hull steel. Chinese Journal of Iron and Steel, 2017, 36(2): 7-16.
2017, Vol. 36 
