CORROSION BEHAVIOR OF 316 STAINLESS STEEL IN SOLUTIONS CONTAINING F-/Cl- IONS

J Chin Soc Corr Pro

2002, Vol. 22

Issue (3): 162-166 DOI:

Research Report

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CORROSION BEHAVIOR OF 316 STAINLESS STEEL IN SOLUTIONS CONTAINING F-/Cl- IONS

Moucheng Li;Chaoliu Zeng;Haichao Lin

中科院金属腐蚀与防护研究所

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Abstract The corrosion behavior of 316 stainless steel (316S S) in dilute acetic acid solutions containing fluoride/chloride ions was investi gated by using electrochemical measurement techniques.It was found that 316 coul d be passivated in 0.1 mol/L HAc solution mixed with 0.001 mol/L NaF and 0.001mo l/L NaCl or with 0～0.1 mol/L NaF.The well passivated films had an internal chro mium oxide rich layer and an external iron oxide rich layer.The results revealed that F- could increase corrosion rate slightly for 316SS in 0.1 mol/L HAc sol ution.No pitting corrosion occurred in the various tested solutions.The corrosio n rate of 316SS increased with increasing the temperature of solutions containin g F-/Cl- ions,but 316SS was still in the passive state at 80℃.

Key words: stainless steel corrosion electrochemical impedance sp ectroscopy fuel cell

Received: 14 November 2000

ZTFLH:

TG172.36

Corresponding Authors: Moucheng Li

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Moucheng Li; Chaoliu Zeng; Haichao Lin. CORROSION BEHAVIOR OF 316 STAINLESS STEEL IN SOLUTIONS CONTAINING F-/Cl- IONS. J Chin Soc Corr Pro, 2002, 22(3): 162-166 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2002/V22/I3/162

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