Preparation of steel plate for can and container excellent in weldability

Abstract

Abstract PURPOSE:To inexpensively prepare steel plate for a can and a container excellent in weldability, by reducing a steel plate coated with a divalent Ni-ion under heating to diffuse and penetrate formed metal Ni throughout steel, and further applying Sn-electroplating and chromate treatment to the steel plate. CONSTITUTION:After the surface of a cold rolled steel plate is subjected to activation treatment, an aqueous solution containing a divalent Ni-ion such as Ni-acetate is applied to the treated steel plate so as to secure 30-300mg/m<2> per a single surface of a metal Ni-addhesion dried. Subsequently, this coated steel plate is heated to about 500- 750 deg.C in a reductive atmosphere to reduce the Ni-compound on the surface of the steel plate to metal Ni through the decomposition of said Ni-compound while a part or the whole of Ni is diffused and penetrated into the surface of the steel plate. Thereafter, refining rolling or cold rolling is applied to the steel plate and Sn-electroplating is subsequently applied to the rolled steel plate so as to adjust an addhesion amount per a single surface to 100-1,500mg/m<2> while, if necessary, the Sn-plating layer is subjected to tin dissolving treatment and, further, chromate treatment to form a chromate film pref. in an amount of about 3-20mg/m<2> per a single surface on the basis of a Cr- amount. By this method, a steel plate for a can and a container excellent in weldability is obtained.

Inventors

• 👤 Yukinobu Higuchi
• 👤 樋口　征順
• 👤 Yashichi Oyagi
• 👤 大八木　八七
• 👤 Yukio Tsukamoto
• 👤 幸雄 塚本
• 👤 Shunichi Kajiwara
• 👤 梶原　俊一

Bibliographic Details