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On corrosion to stainless steel by calcium chloride
with different extender |
Lv XU,Yuanyang HU,Liwei WANG,Ruzhu WANG, |
Institute of Refrigeration
and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China; |
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Abstract 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.
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Keywords
stainless steel
corrosion
calcium chloride
expanded graphite
activated carbon
oxidation creation
pitting corrosion
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Issue Date: 05 June 2010
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