Effects of free tin on filiform corrosion behavior of lightly tin-coated steel
- Nippon Steel Corp., Aichi (Japan). Nagoya Research and Development Lab.
Filiform corrosion behavior of lightly tin (Sn)-coated steel (LTS) for welded cans was studied in relation to the free Sn coating weight (free Sn coating weight = total Sn [minus] alloyed Sn). Filiform corrosion was found to be retarded by high cathodic polarization in the region where the free Sn coating weight was > 0.35 g/m[sup 2] and in the region where the free Sn coating weight was > 0.35 g/m[sup 2] and in the region where the free Sn coating weight was <0.1 g/m[sup 2] but where the electrochemically determined chromium (Cr) coating weight was high. In the region where the free Sn coating weight was 0.1 to 0.35 g/m[sup 2], microcells were formed by the coupling of free Sn and the tin-iron alloy below the lacquer film, resulting in acceleration of filiform corrosion.
- OSTI ID:
- 5305274
- Journal Information:
- Corrosion (Houston); (United States), Journal Name: Corrosion (Houston); (United States) Vol. 50:1; ISSN 0010-9312; ISSN CORRAK
- Country of Publication:
- United States
- Language:
- English
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