Preparation method of micro-nano holes in surface of nickel-containing iron-chromium alloy

• Main Authors: SHEN YINGDONG, ZHAO ZHENGDA, CHEN ZHEN, LIU YUSONG, NI LIJUAN, YANG ERHAO, ZHOU FAN, CHEN CHENG
• Format: Patent
• Language: Chinese; English
• Published: 11.02.2022
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROFORMING; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS

The invention discloses a preparation method of micro-nano holes in the surface of a nickel-containing iron-chromium alloy. The method comprises the following steps that firstly, the alloy is pretreated to remove surface impurities; the surface of the alloy is subjected to first-time anodic oxidation treatment, the alloy serves as an anode, a graphite sheet serves as a cathode, first-time anodic oxidation is conducted, and then the alloy is cleaned with ethyl alcohol and dried for use; and then, secondary anodic oxidation treatment is conducted on the surface of the alloy subjected to primary anodic oxidation treatment, the alloy serves as an anode, a graphite flake serves as a cathode, secondary anodic oxidation is conducted in a sodium dihydrogen phosphate dihydrate solution, then ethyl alcohol is used for cleaning, and the flexible alloy surface with obvious micro-nano holes is obtained after drying. According to the method, the alloy surface is subjected to flexible treatment by adopting a two-time anodic