Study on Effect of Mn Content on Corrosion Resistance of New High Strength Non-coating 3Ni Constructional Steel by Corrosion Big Data Technology
In order to solve the problems of low strength and poor corrosion resistance of the 3Ni steel in littoral environment,by increasing content of Mn in the 3Ni steel,the effect of Mn on the strength and toughness of the 3Ni steel and its corrosion resistance in high temperature,high humidity and high salt marine atmosphere as well as relevant mechanism were studied.Firstly,the effect of Mn on the mechanical properties and corrosion resistance of the new non-coated 3Ni constructural steel was evaluated by slow strain rate tensile test based on mechanical properties testing and indoor dry-wet circles testing.Then the corrosion laws and their differences of the new non-coating 3Ni constructural steel in the state with stress and with no stress were rapidly evaluated by using the corrosion big data technology together with machine learning method.The study results showed that increasing content of Mn can enhance the strength of the non-coating 3Ni constructional steel,but its low temperature impact toughness worsened.Meanwhile,increasing content of Mn was detrimental to the uniform corrosion resistance of the non-coating 3Ni constructional steel,and the corrosion rate enlarged with the increasing content of Mn.However,the increasing content of Mn did not change the corrosion form of the steel and the 3Ni steels with different content of Mn exhibited incomplete and uniform corrosion behavior in the littoral atmospheric simulated solution.Meanwhile,corrosion big data technology could quickly and effectively identify the effect of atmospheric stress and Mn content on the corrosion of the new non-coated 3Ni steel in the atmospheric environment of simulated coastal area with and without stress and the effect of Mn content on the corrosion.Without stress existed,the average instantaneous corrosion rate of the non-coating 3Ni constructional steel increased with increasing content of Mn,with stress existed,the average instantaneous corrosion rate of the non-coating 3Ni constructional steel decreased with increasing content of Mn.
littoral environmentnon-coating 3Ni constructional steelMn elementstress corrosioncorrosion big data technology
万方数据
维普
