On corrosion to stainless steel by calcium chloride with different extender

2010年第4卷第2期

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《能源前沿（英文）》 >> 2010年第4卷第2期 doi: 10.1007/s11708-009-0065-2

On corrosion to stainless steel by calcium chloride with different extender

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Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China;

发布日期： 2010-06-05

摘要

A calcium chloride solution with a different extender, which is made up of either pure calcium chloride, calcium chloride with expanded graphite, or calcium chloride with activated carbon, acts differently on stainless steel. The mass ratio between calcium chloride with expanded graphite or activated carbon is almost 4∶1, which is demonstrated to be the optimum ratio. The experimental research in this paper reveals that, of the three solutions, which are pure calcium chloride, calcium chloride with expanded graphite, and calcium chloride with activated carbon, the strongest oxidation creation and pitting corrosion happened in the solution of calcium chloride with expanded graphite, the weakest oxidation creation happened in the solution of calcium chloride with activated carbon, and pitting corrosion was stronger than oxidation creation in the solution of pure calcium chloride. This paper gives the reasons for these phenomena. Furthermore, based on theory analysis, multiple means and approaches are provided to prevent stainless steel from further corroding.

关键词

stainless steel ; corrosion ; calcium chloride ; expanded graphite ; activated carbon ; oxidation creation ; pitting corrosion

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