Dr., O. P. Modi and M N , Munagole and Dr., K P Singh (1990) Potentiodynamic studies of modified 9Cr-1Mo ferritic steel in sulphuric acid and seawate. Corrosion Science, 30. pp. 941-947.

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Abstract

The potentiodynamic behaviour of annealed and cold worked 9Cr-1Mo, modified with V0.198 wt% and Nb 0.072 wt%, ferritic steel has been studied in H2SO4 in the concentration range 0.1–5 N at a scan rate of 45 mV min−1 at 25°C. Ecorr becomes more noble while the other electrochemical parameters, i.c. icorr, icrit, ip and Ecp for both states of the modified steel decrease with the increase in acid concentration. This trend was more marked in the annealed than in the cold worked alloy. This alloy shows a higher corrosion resistance in IN H2SO4 than pure 9Cr-1Mo steel. Slight passivation at higher potential in both cold worked and annealed modified 9Cr-1Mo was observed in seawater whereas no passivation was indicated in the case of annealed pure 9Cr-1Mo steel under the same experimental condition. The different corrosion behaviour has been explained as a result of microstructural differences.

Item Type:	Article
Subjects:	Lightweight Materials
Divisions:	UNSPECIFIED
Depositing User:	Mr. B.K. Prasad
Date Deposited:	08 Aug 2013 06:56
Last Modified:	08 Aug 2013 06:56
URI:	http://ampri.csircentral.net/id/eprint/236

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