2008•Cailiao kexue yu gongcheng xuebaoRequires access
Effect of NaC1 Deposit on the Corrosion Behavior of CuBiA1 Alloy at 700-900℃
Ruijun Zhang, Ling Chen, Lei Guan, Xiaocui Liu, Jianhua Liu
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Abstract
The effect of NaCl deposit on the corrosion behavior of CuBiAl alloy at 700-900 ℃ was studied by means of metalloscope, XRD, SEM/EDX and thermograimetnc. The results show that in air without NaCl, the weight gain of sample was small due to the formation of a compact and uniform oxide protective scale. However, with a solid NaCl deposit on its surface, the corrosion of CuBiAl alloy in air was obviously accelerated, and Al was easier to be eroded than Cu, by which, chromium depletion is developed in the surface of alloy beneath the NaC1 deposit. On the basis of which, acceleration mechanisms of NaCl on the corrosion of CuBiAl alloy were also discussed.