公开(公告)号：US3907609A

公开(公告)日：1975-09-23

申请号：US44247874

申请日：1974-02-14

Applicant: MC DONNELL DOUGLAS CORP

Inventor： COGGINS DOLPHUS LARRY

IPC: C23C22/64 ,  C23C1/10 ,  C23F7/24

CPC classification number: C23C22/64

Abstract: This application discloses a chemical conversion process and composition for producing an adherent conversion coating on titanium and its alloys. The composition comprises a combination of sodium hydroxide and a hexavalent chromium compound. The process comprises the treatment of the titanium part with the usual, well-known nitric-hydrofluoric acid solution and/or an alkaline cleaner to obtain a clean surface. Then the parts are exposed to the process of this application which produces a surface resulting in increased adhesion or retention of subsequently applied coatings such as chemical milling maskants, adhesive bonding materials, lubricants, other protective coatings, and enhances the adhesion of composite materials to titanium.

Abstract translation: 本申请公开了用于在钛及其合金上生产粘附转化涂层的化学转化方法和组合物。 组合物包含氢氧化钠和六价铬化合物的组合。 该方法包括用通常的众所周知的硝酸氢氟酸溶液和/或碱性清洁剂处理钛部分以获得干净的表面。 然后将这些部件暴露于该应用的过程中，其产生表面，导致随后施加的涂层（例如化学研磨掩蔽剂，粘合剂粘合材料，润滑剂，其它保护涂层）的附着力或保留性增加，并且增强复合材料与钛的粘附性 。