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J Chin Soc Corr Pro  1988, Vol. 8 Issue (3): 199-206    DOI:
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EFFECT OF TRACE Cl~- ON CORROSION BEHAVIOR OF 316L SS IN BOILING ACETIC ACIDFORMIC ACID MIXTURE
Zuo Yu(Beijing Institute of Chemical Technology)
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Abstract  Effect of trace Cl~- on corrosion behavior of 316L SS in boiling 84% acetic acid-10% formic acid-6% water mixture is investigated by weight loss, polarization measurement and AES tests. Trace Cl~-(50ppm) has a slight inhibition effect on the anodic dissolution of the material because of its adsorption on the surface, but corrosion rate increases when the concentration of Cl~- increases to 200 ppm. Anodic passivation region is found on the anodic polarization curve and the passive film formed on the surface is enriched in Cr and O but depleted in Fe and Ni. The addition of Cl~- decreases the content of Cr and the Cr/Fe ratio in the film, and thus increases the O/(Cr+Fe) ratio. Then the protective effect of the passive film decreases and pitting incurs.
Received:  25 June 1988     
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Zuo Yu(Beijing Institute of Chemical Technology). EFFECT OF TRACE Cl~- ON CORROSION BEHAVIOR OF 316L SS IN BOILING ACETIC ACIDFORMIC ACID MIXTURE. J Chin Soc Corr Pro, 1988, 8(3): 199-206.

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https://www.jcscp.org/EN/     OR     https://www.jcscp.org/EN/Y1988/V8/I3/199

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