首页>
外国专利>
The water soluble constituent for water repellency treatment of spelter and the spelter alloy which feature the water soluble
The water soluble constituent for water repellency treatment of spelter and the spelter alloy which feature the water soluble
展开▼
机译：一种以水溶性为特征的用于喷溅水的喷溅处理的水溶性成分和喷溅合金
展开▼
页面导航
摘要
著录项
相似文献
摘要
PROBLEM TO BE SOLVED: To obtain an aqueous composition for water-repellent treatment of zinc and zinc alloy, containing a specific nonionic high-molecular-weight compound, efficiently giving zinc or zinc alloy water repellency to markedly reduce the contact area of water to the metallic materials and improve their anticorrosion properties. ;SOLUTION: This composition contains a nonionic high-molecular-weight compound bearing hydrophilic groups and hydrophobic groups, preferably in a concentration of 0.1-10wt.%. The nonionic polymer is, for example, a polyvinyl alcohol or Methyl Cellulose (R), preferably having a weight-average molecular weight of 10,000-16,000. The objective composition preferably contains 0.01-10wt.% of an alkali metal salt of a polyacrylate with a weight-average molecular weight of 250,000-7,000,000. The composition preferably has a pH of 6-8. This composition is preferably applied to a chemical conversion-treated substrate which is obtained, for example, by plating a substrate such as steel with zinc or a zinc alloy to form its coating layer and the coating layer is subjected to the chemical conversion treatment by using a chemical conversion solution free from hexavalent chromium.;COPYRIGHT: (C)1997,JPO
展开▼
