Washing agent and method for treating copper and copper alloy surface oxidation layer

Abstract

The invention relates to a lotion for treating the oxidized layer on the surface of copper and copper alloy, which is made of the following raw materials in parts by weight: 90-220 parts of sulfuric acid, 40-90 parts of ammonium persulfate, 40-65 parts of glacial acetic acid, and benzene Azole 0.05‑0.2 part. The invention removes the oxide skin of copper and copper alloy products at one time, the inner and outer surfaces of the products and accessories are clean, the color is bright, uniform and shows the normal color of copper and copper alloys, there is no over-corrosion phenomenon, and the threads and accessories are free of any corrosion. damage; the process temperature range is wide, no heating is required in winter, and the natural environment can be produced; the operation is simple, the process parameters are easy to control, no need for frequent adjustments, high production efficiency, and low cost; copper and copper alloy product parts can be used in the same tank Liquid cleaning at the same time; no harmful gas volatilization, no need to add environmental protection equipment.

Description

technical field [0001] The invention relates to a lotion for treating the surface of metal products, in particular to a lotion for treating the oxide layer on the surface of copper and copper alloy and a treatment method thereof. Background technique [0002] The surface of copper and copper alloy products and parts can form oxides with oxygen in the air at room temperature. After processing (annealing, high-temperature bending, welding, etc.) heat treatment is easier to oxidize at high temperature, and a thicker and denser layer will be formed. The oxide skin brings great difficulties to the subsequent processing and use. Cleaning according to the existing common pickling process for copper and its alloys is difficult to meet the quality requirements. First, complex products are not cleanly removed or corroded unevenly, the product is prone to over-corrosion, and the threads of alloy parts are easily damaged; second, the process parameters are strict; third, the production...

AI Technical Summary

Problems solved by technology

[0002] The surface of copper and copper alloy products and parts can form oxides with oxygen in the air at room temperature. After processing (annealing, high-temperature bending, welding, etc.) heat treatment is easier to oxidize at high temperature, and a thicker and denser layer will be formed. The oxide skin brings great difficulties to the subsequent processing and use

Cleaning according to the existing common pickling process of copper and its alloys, it is difficult to meet the quality requirements

First, complex products are not cleanly removed or corroded unevenly, the product is prone to over-corrosion, and the threads of alloy parts are easily damaged; second, the process parameters are strict; third, the production environment is polluted, and environmental protection equipment is required; fourth Yes, it is difficult to remove oxide scale in low temperature environment, and the temperature environment needs to be controlled; fifth, the solution changes quickly, the cleaning volume is small, and frequent adjustments are required, resulting in high cost; sixth, copper and copper alloy products cannot be cleaned in the same bath at the same time. separate bath

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