| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.12 ( July 1985 ) Special Issue on Hot-and Cold-rolled Steel Sheets ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Lightly Tin-Coated Steel Sheet "RIVERWELT" for Welded Cans by Ni-Diffusion Treatment Kazuo Mochizuki, Hisatada Nakakouji, Hajime Ogata, Toshio Ichida, Toshio Irie |
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Synopsis : A new type of lightly tin-coated steel, named "RIVERWELT", was developed for welded cans. in the manufacturing process, base steel with a thin Ni-diffusion layer which was prepared by annealing Ni-plated steel on the continuous annealing line is lightly tin-coated, partially flow-melted, and cathodically electrodeposited in a chromic acid solution. The nickel diffusion layer plays an important role in improving corrosion resistance by decreasing the corrosion potential difference between tin deposit and base metal, and by forming a dense and homogeneous Fe(Ni)-Sn alloy layer. RIVERWELT has a good weldability because of the sufficient amount of residual metallic tin after baking. It also has excellent lacquer-adhesivity due to the special chromate film consisting of metallic and oxide chromium. |
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