Rust remover and rust-removal method for copper parts

Abstract

The invention relates to a rust remover and a rust-removal method for copper parts. The rust remover is characterized by comprising the following components in percentage by weight: 8 percent of chromic anhydride, 0.3-0.4 percent of sulfuric acid, 0.03 percent of sodium chloride and 90-92 percent of water. The rust-removal method comprises the following steps of: respectively weighing the components according to proportions, sequentially adding the components and uniformly stirring the components; washing the copper parts for oil removal by using gasoline or acetone; soaking the copper parts subjected to oil removal by washing into a rust remover solution prepared from the components in percentage by weight for about 1-2min under the normal temperature; taking the copper parts out of the rust remover solution, immediately rinsing the copper parts by using tap water for 1 minute, and soaking the copper parts into a 2% sodium carbonate water solution for about 2min; and taking the copper parts, rinsing the copper products by using tap water and then wiping the copper parts to dryness. The rust-removal method is simple, has no influence to the surface precision of the copper parts, ensures that the surface subjected to rust removal is glossy and especially has a better dust removal effect on brass parts; the rust remover has an inactivation function; and the treated brass parts are golden yellow.

Description

technical field [0001] The invention relates to a metal derusting agent, in particular to a derusting agent and a derusting method for copper parts. Background technique [0002] Under normal circumstances, copper will not rust when placed in dry air, but if the copper is processed or placed in a humid environment, after a period of time, the surface of the copper will be exposed to the combined action of water, oxygen and carbon dioxide in the air. , to generate basic copper carbonate, commonly known as patina, that is, rust, which seriously affects the accuracy and gloss of the surface of copper parts. Contents of the invention [0003] The object of the present invention is to aim at existing problems, provide a kind of method simple, do not have any influence to the surface precision of copper material parts, surface luster after derusting, show copper material natural color copper material part derusting agent and derusting method. [0004] The purpose of the present...

AI Technical Summary

Problems solved by technology

[0002] Under normal circumstances, copper will not rust when placed in dry air, but if the copper is processed or placed in a humid environment, after a period of time, the surface of the copper will be exposed to the combined action of water, oxygen and carbon dioxide in the air. , to generate basic copper carbonate, commonly known as patina, that is, rust, which seriously affects the accuracy and gloss of the surface of copper parts