| 摘要 |
PURPOSE:To manufacture an amorphous alloy-base composite material having high solderability and workability by plating an amorphous alloy with a metal after chemical polishing and electrolytic activation. CONSTITUTION:An amorphous alloy is chemically polished by immersion or electrolysis in an acidic activating bath contg. hydrochloric acid, sulfuric acid, citric acid, acetic acid or nitric acid, a nonionic or amphoteric surfactant and N-alkyltrimethylenediamine. The surface of the polished alloy is activated by electrolytic activation in a cathodic electrolytic bath contg. phosphoric acid, sulfuric acid, citric acid or acetic acid, a nonionic or amphoteric surfactant and an amine-base corrosion inhibitor. By the activation, a passive film on the surface of the alloy is removed, and a monomolecular layer which prevents the penetration of hydrogen atoms is rapidly formed on the surface of the alloy. The amorphous alloy is then subjected to electroplating and/or electroless plating to form a plated layer having superior adhesion without causing hydrogen embrittlement. |
