-
公开(公告)号:US6159552A
公开(公告)日:2000-12-12
申请号:US231891
申请日:1999-01-14
申请人: Richard E. Riman , Seung-Beom Cho
发明人: Richard E. Riman , Seung-Beom Cho
CPC分类号: C23C22/62 , Y10T428/12694
摘要: The formation of passivation coatings on ferrous substrates is disclosed by heating the substrate in an aqueous 1.0 to 6.0 M basic metal hydroxide treatment bath containing SiO.sub.2 and a water-soluble glycol, at a temperature that is effective to form a passivation coating on the substrate until the passivation coating is formed thereon, wherein the treatment bath contains from about 0.25 to about 1.0 moles of SiO.sub.2 per liter of glycol and water.
摘要翻译: 通过在含有SiO 2和水溶性二醇的1.0〜6.0M碱性金属氢氧化物水溶液的水溶液中加热底物,在有效地在基材上形成钝化涂层的温度下,直到 在其上形成钝化涂层,其中处理浴每升二醇和水含有约0.25至约1.0摩尔的SiO 2。