Dip phosphating process
AssigneeNippon Paint Co., Ltd.
InventorsRyoichi Murakami, Hideo Shimizu, Syuzi Sato
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Abstract
A dip phosphating process, which comprises introducing a substrate to be phosphated into a phosphating bath while undulating the phosphating solution at the entrance section of the bath.
Claims6
A dip phosphating process, which comprises introducing a substrate to be phosphated into a bath containing a phosphating solution, while undulating, without splashing, the phosphating solution at the entrance section of the bath, wherein the substrate is washed by spouting a phosphating solution and/or water thereto when the substrate is taken out of the phosphating solution in the bath at the exit section.
A dip phosphating process comprising introducing a substrate into a phosphating bath, dipping the substrate in the phosphating solution in the bath until the substrate is phosphated and taking out the phosphated substrate from the phosphating bath, characterized in that the introduction of the substrate into the phosphating bath is carried out while undulating, without splashing, the phosphating solution in the bath at the entrance section of the bath so as to prevent the stepped unevenness of the phosphating and wherein a phosphating solution or water is spouted against the substrate when the substrate is removed from the bath so as to remove any sludge which may have been developed thereupon.
Dependencies are inferred from the claim text.