THE EFFECT OF CHLORIDE ON THE CORROSION OF AUSTENITIC STEEL IN NITRIC ACID
A laboratory study of the influence of chlorides at concentrations likely to be present in ores for processing at Springfields on the rate of corrosion of austenitic steel plant material in nitric acid media has been undertaken. It has been shown that chlorides increase the rate of corrosion in the vapor phase but not significantly in the liquid phase. Attack in the vapor phase is thought to be due to the corrosive action of condensed vapor which may contain a higher concentration of chlo ride than the original solution because of the appreciable volatility of nitrosyl chloride formed by the action of nitric acid on chlorides. The nature of the corrosion is governed by the experimental conditions; localized pitting occurs if the condensate is allowed to accumulate on a small area of metal, otherwise the attack is of a more general nature. Under plant conditions the former type of attack is potentially the more dangerous. (auth)
- Research Organization:
- United Kingdom Atomic Energy Authority. Industrial Group. Culcheth Labs., Culcheth, Lancs, England
- NSA Number:
- NSA-13-002995
- OSTI ID:
- 4274145
- Report Number(s):
- RDB(C)TN-124
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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