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| Corrosion Resistance of Various Bridge Steels in Deicing Salt Environments |
LI Lin1,2( ), CHEN Yiqing1,2, GAO Peng1,2, AI Fangfang1,2, ZHONG Bin1,2, SAN Hongyu1,2, YANG Ying2 |
1 State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009, China
2 Iron & Steel Research Institute of ANGANG Group, Anshan 114009, China |
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Abstract The corrosion behavior of bridge steels Q345qENH and Q420qENH in deicing salt was studied by means of wet-dry cyclic corrosion test, immersion corrosion test and rust scale characterization, while taking Q345qE steel as comparison. The results indicate that the corrosion resistance of the Q345qENH and Q420qENH weathering bridge steels was better than that of the Q345qE steel. The dry-wet cyclic corrosion test results reveal that the Q345qENH, Q420qENH and Q345qE steels show corrosion rates of 26.88, 27.5, and 33.75 times higher than those measured in immersion corrosion test, respectively. During dry-wet cyclic corrosion test, the structure and composition of the formed rust scales changed and the amount of α-FeOOH phase increased gradually with time, which may be an important reason leading to the decrease of corrosion rate at the end of dry-wet cyclic test.
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Received: 31 December 2019
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| Fund: National Key R&D Program of China(2017YFB0304800) |
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Corresponding Authors:
LI Lin
E-mail: ansteellilin@163.com
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