CN103103544A - Rust remover and rust-removal method for copper parts - Google Patents

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

A kind of copper material part rust remover and derusting method

Technical field

The present invention relates to Deruster for metal, especially relate to a kind of copper material part rust remover and derusting method.

Background technology

Generally, copper is placed in dry air and can get rusty, if but with after copper processing or in the middle of the environment of humidity, after a while, surface meeting aerial water, oxygen and the common effect of carbonic acid gas of copper generate ventilation breather, are commonly called as verdigris, namely get rusty, have a strong impact on precision and the glossiness of copper material piece surface.

Summary of the invention

The objective of the invention is for the problem to exist, provide a kind of method simple, copper material piece surface precision is not had any impact, rust cleaning rear surface gloss, show copper material part rust remover and the derusting method of copper material true qualities.

The objective of the invention is to be achieved through the following technical solutions, a kind of copper material part rust remover and derusting method is characterized in that: described rust remover is grouped into by following one-tenth by weight percentage: chromic anhydride 8%, sulfuric acid 0.3～0.4%, sodium-chlor 0.03%, water 90～92%; Above-mentioned each composition is proportionally weighed respectively, add successively, stirring gets final product.

Described derusting method comprises the steps:

(1), the copper material part is cleaned oil removing with gasoline or acetone;

(2), under normal temperature, the copper material part that cleans oil removing is immersed in the rust remover solution of making by above weight percent composition, approximately 1～2min;

(3), the copper material part is taken out from rust remover solution rinses 1min with tap water immediately, then immerse in 2% aqueous sodium carbonate approximately 2min;

(4), the copper material part taken out with the tap water flushing, dry.

Beneficial effect: the inventive method is simple, copper material piece surface precision is not had any impact, rust cleaning rear surface gloss, and is especially better to brass part rust cleaning effect, and passivation is arranged, and it is golden yellow that the brass part after processing is.

Embodiment

Embodiment:

A kind of copper material part rust remover and derusting method are with each composition of following components by weight percentage: chromic anhydride 8%, sulfuric acid 0.3～0.4%, sodium-chlor 0.03%, water 90～92%; Proportionally weigh respectively, add successively, stir and namely can be made into rust remover solution.

The rust cleaning step:

(1), the copper material part is cleaned oil removing with gasoline or acetone;

(2), under normal temperature, the copper material part that cleans oil removing is immersed in the rust remover solution of making by above weight percent composition, approximately 1～2min;

(3), the copper material part is taken out from rust remover solution rinses 1min with tap water immediately, then immerse in 2% aqueous sodium carbonate approximately 2min;

(4), the copper material part taken out with the tap water flushing, dry.

Claims (1)

1. a copper material part rust remover and derusting method, it is characterized in that: described rust remover is grouped into by following one-tenth by weight percentage: chromic anhydride 8%, sulfuric acid 0.3～0.4%, sodium-chlor (). () 3%, water 90～92%; Above-mentioned each composition is proportionally weighed respectively, add successively, stirring gets final product.

Described derusting method comprises the steps:

(1), the copper material part is cleaned oil removing with gasoline or acetone;

(2), under normal temperature, the copper material part that cleans oil removing is immersed in the rust remover solution of making by above weight percent composition, approximately 1～2min;

(3), the copper material part is taken out from rust remover solution rinses 1min with tap water immediately, then immerse in 2% aqueous sodium carbonate approximately 2min;

(4), the copper material part taken out with the tap water flushing, dry.