Improvement of Continuity of the Alloy Layer of Electrolytic Tinplate: Experiments with Oxidizing Pickling Agents
1971; Taylor & Francis; Volume: 49; Issue: 1 Linguagem: Inglês
10.1080/00202967.1971.11870169
ISSN1745-9192
AutoresL. R. Beard, D. R. Gabe, L. M. Warner,
Tópico(s)Hydrogen embrittlement and corrosion behaviors in metals
ResumoSummaryIn continued attempts to determine factors affecting the corrosion behaviour of tinplate, an examination has been made of various pickling treatments for steel prior to laboratory acid tinning and flowmelting. Corrosion behaviour has been assessed by the "Special Property" tests which are currently used to assess tinplate in relation to shelf life of cans. Results have shown that the use of HNO3 as a pickling treatment prior to tinplating can be extremely effective in improving corrosion behaviour. Optimum concentration was shown to be 5% w/v. An explanation for the improved corrosion behaviour is offered in terms of improved alloy (FeSn2) continuity which in turn is dependent on the effect of HNO3 on the steel surface prior to tinplating. Reference is made to a commercial trial which confirms the laboratory experimental results.
Referência(s)