INHIBITION EFFECT OF NaNO3 FOR 316L STAINLESS STEEL IN Cl- CONTAINING ITACONIC ACID SOLUTIONS

J Chin Soc Corr Pro

1999, Vol. 19

Issue (2): 115-119 DOI:

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INHIBITION EFFECT OF NaNO3 FOR 316L STAINLESS STEEL IN Cl- CONTAINING ITACONIC ACID SOLUTIONS

Jinming Long;;

昆明理工大学材料系

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Abstract By weight loss and electrochemical measurements and XPS analysis,the inhibition effect of NaNO3 for 316L stainless steel in Cl- containing itaconic acid media was investigated.The results showed that the pitting corrosion of the steel in the media could be prevented effectively in the presence of some amounts of NaNO3,which could raise the critical pitting potential up to the transpassive potential so as to result in a superior pitting resistance.The competitive adsorption between NO3- and Cl- on the steels surface might be a main mechanism for inhibition.In view of the dual functions of NaNO3 as an inhibitor and as a nitrogenous source necessary for the fermentation process,it is feasible for NaNO3 to be recommended for use in the production of itaconic acid by fermentation

Key words: inhibitor stainless steel pitting corrosion itaconic acid

Received: 21 July 2005

Corresponding Authors: Jinming Long

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Cite this article:

Jinming Long. INHIBITION EFFECT OF NaNO3 FOR 316L STAINLESS STEEL IN Cl- CONTAINING ITACONIC ACID SOLUTIONS. J Chin Soc Corr Pro, 1999, 19(2): 115-119 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1999/V19/I2/115

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