Electrochemical properties and chemical passivity of etch-resistant surface films on steel View Full Text


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Article Info

DATE

1966-03

AUTHORS

I. V. Karpenko, E. M. Gutman, A. K. Mindyuk

ABSTRACT

All the types of etch-resistant surface films studied are electropositive with respect to the underlying metal. The most electropositive potential was recorded for films of maximum thickness.Adjacent steel surfaces with and without etch-resistant films form galvanic macro- and microcells in which the etch-resistant films act as cathodes.The etch-resistant films can, under specified conditions, considerably reduce the corrosion rate of steel in acid media. For example, a 20% reduction in the corrosion rate for 40Kh steel specimens with type II surface films was recorded in tests in a 53% H2SO4 solution.A tentative explanation (based on the results of X-ray diffraction and metallographic analyses) of the electrochemical and corrosion properties of etch-resistant films is offered.An analogy is suggested between the action of etch-resistant surface films and porous cathodic coatings. More... »

PAGES

115-121

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00715898

DOI

http://dx.doi.org/10.1007/bf00715898

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1026335786


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