Preparation and Study of Accelerated Corrosion Test Spectrum of Low Alloy High Strength Steel in Polar Environment

Based on the requirement of the corrosion evolution and life prediction of high strength low alloy steel in the polar environment, the accelerated test environment spectrum and accelerated corrosion test method of steels in Antarctic environment are investigated, which can provide techniques for the study of the corrosion behaviors and resistance of low alloy steels serving in the low temperature and freeze-thawing environments. According to the atmospheric environmental parameters of Zhongshan station in the polar region, the Antarctic environment can be divided into three stages including the moist air, freeze-thaw cycle, and low temperature freezing environments. Then, the equivalent conversion factor is calculated based on the monitor of the galvanic corrosion current using atmospheric corrosion sensor. In the end, the simulation and acceleration process of the Antarctic corrosion environment are completed through salt spray, freeze-thaw, frozen coupling accelerated corrosion test, which provides references for the preparation of the accelerated corrosion test spectrum in the low temperature environment. The results demonstrate that the corrosion behavior under the accelerated spectrum exhibits superior consistency with the outdoor exposure test.