Aluminum paste coating and production method and application thereof

• Main Authors: RHOADS MARK ALAN, KOOL LAWRENCE BERNARD
• Format: Patent
• Language: Chinese; English
• Published: 04.04.2023
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

Methods of reducing hexavalent chromium concentration in a first aluminum paste by adding a reducing agent to form a second aluminum paste are provided. The reducing agent causes a chemical reduction reaction with the hexavalent chromium compound in the first aluminum paste to form a trivalent chromium compound in the second aluminum paste such that a first weight ratio of hexavalent chromium to trivalent chromium in the first aluminum paste is reduced to a second weight ratio of hexavalent chromium to trivalent chromium in the second aluminum paste, the second weight ratio being less than the first weight ratio. 提供了通过添加还原剂以形成第二铝浆来降低第一铝浆中六价铬浓度的方法。所述还原剂引起与第一铝浆中的六价铬化合物的化学还原反应以在第二铝浆中形成三价铬化合物，使得第一铝浆中的六价铬与三价铬的第一重量比降低至第二铝浆中的六价铬与三价铬的第二重量比，第二重量比小于第一重量比。