CORROSION PERFORMANCE OF HIGH STRENGTH WEATHERING STEELS UNDER DIFFERENT HEAT TREATMENT STATES
The corrosion performance of high strength weathering steel with Cu,Cr micro-alloying under as-rolled,annealed,normalized,and TMCP states was studied.Results showed that the microstructures of steels under as-rolled,annealed and normalized states were composed of pearlite and ferrite.Average grain size of as-rolled steel was the largest,followed by annealed and normalized.The microstructure of TMCP was mainly consisted of martensite.The corrosion potentials of naked steels in TMCP,as-rolled,annealed and normalized states had little difference,but the corresponding corrosion currents were 0.1287× 10-5A·cm-2,0.4418 × 10-5A·cm-2,0.7364× 10-5A·cm-2 and 1.064× 10-5A·cm-2,respectively.However,the variation tendency of polarization resistance was contrary to the corrosion currents.After two months,the polarization resistance of the TMCP steel decreased to 1304 ·cm2,but the annealed,as-rolled and normalized steel increased to 1881Ω·cm2,1561Ω·cm2 and 1068Ω·cm2,respectively.The arrangement of annual corrosion rate from high to low was: normalized,as-rolled,annealed and TMCP steel,and the rule of rust layer from thick to thin was similar.
High strength weathering steel Corrosion properties Heat treatment states
WANG Yue LIU Zili LIU Xiqin ZHANG Shoudong TIAN Qingchao
College of Materials Science and Engineering,Nanjing University of Aeronautics and Astronautics,Nanj Baoshan Iron & Steel Co.,Ltd,Shanghai 201900,China
国内会议
杭州
英文
1171-1177
2015-11-11（万方平台首次上网日期，不代表论文的发表时间）