What to do if the hardware shrapnel is not clean

Netizens ask: When maintaining the instrument, I found that the metal shrapnel is difficult to clean. What should I do? 　　Metal stamping manufacturer replied: Hello, regular cleaning can prolong the service life of the shrapnel and reduce production costs, and you need to pay attention to the following when cleaning Three points: 　　 1. The fat, oil, and lubricating oil pollution on the shrapnel should be wiped dry with a soft cloth or paper and then washed with a neutral detergent or ammonia solution or a special detergent; fingerprints, with alcohol or organic solvents (ether , Benzene), wipe dry with a soft cloth and then wash with water; bleach and kind of acid attached immediately rinse with water, soak in ammonia or neutral carbonated soda aqueous solution, and then wash with neutral detergent or warm water.　　2. The welding of the shrapnel discolors when heated, wash it with 10% nitric acid or hydrofluoric acid solution, then neutralize it with ammonia water, carbonated soda dilute solution, and then wash the stainless steel spring with water--special use for washing medicine; organic carbide adhesion

Soak in hot neutral detergent or ammonia solution and wash with weak abrasive detergent. 3. Use warm water and weak detergent to scrub labels and films; use soap, weak detergent or warm water to clean dust and dirt easily; use alcohol or organic solution for binder components; surface contaminants on metal shrapnel Use nitric acid (10%) or abrasive detergent to wash the caused rust-use special detergents to cause excessive rainbow patterns, use detergents or oils, and use warm water detergents when washing.