Weight of products retained at the surface of galvanized steel and its application to estimating atmospheric corrosivity
- Institute of Physical Chemistry, Moscow (Russian Federation)
The correlation between corrosion mass loss of galvanic zinc and cadmium coatings and the weight of corrosion products retained is studied using samples exposed for 1-3 years in open and semiclosed atmospheres at 11 corrosion stations located in cold, moderate, subtropical, and tropical climate zones in Russia, Georgia, Vietnam, and Cuba. Accumulation of corrosion products on metals is accompanied by their natural aging and removal from the surface. The higher the atmospheric corrosivity, the higher the rate of removal. The weight of products retained on zinc-plated steel increases over a period of some years in proportion to the weight of metal reacted, the latter being estimated from the regression equations deduced. Retrospective corrosion estimates based on data involved in mathematical treatment, as well as data of some other stations, and accelerated tests in climatic chambers show that calculated and observed corrosion values differ by 20-35%.
- OSTI ID:
- 91204
- Journal Information:
- Protection of Metals, Journal Name: Protection of Metals Journal Issue: 6 Vol. 30; ISSN 0033-1732; ISSN PTNMAR
- Country of Publication:
- United States
- Language:
- English
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