Method for preparing medium-high pressure corrosion foil by using corrosion process with phosphoric acid as corrosion inhibitor

• Main Authors: YUAN XINXIN, AI XIANYUN, YUAN YE
• Format: Patent
• Language: Chinese; English
• Published: 11.02.2022
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS

The invention discloses a method for preparing a medium-high pressure corrosion foil by using a corrosion process with phosphoric acid as a corrosion inhibitor. The method comprises the following steps of pre-treatment, hole-forming corrosion, cleaning, reaming corrosion, post-treatment and cleaning, and drying. Specially at the reaming corrosion stage, an aluminum foil subjected to intermediate treatment is put into a solution with the bath solution comprising 5-10 Wt% of nitric acid, 0.2-0.6 Wt% of aluminum ions and 0.5-1.0 Wt% of phosphoric acid, and the phosphoric acid is used as a corrosion inhibitor, so that the content of the corrosive liquid can be accurately measured, and great convenience is brought to production control. Meanwhile, after the phosphoric acid is used as the corrosion inhibitor, the mechanical property, especially the bending property, of the produced corrosion foil after formation is greatly improved, the product quality is improved, and the corrosion foil has very high economic valu