Hardware shrapnel will be difficult to clean

Cleaning hardware shrapnel has the following precautions: 　　 1. The fat, oil, and lubricating oil contamination of the hardware shrapnel should be wiped dry with a soft cloth or paper. In the future, use a neutral detergent or ammonia solution or special scrubbing chemicals to scrub; fingerprints, use alcohol or Organic solvents (ether, benzene), wipe dry with a soft cloth and then wash with water; bleach and kind of acid attached immediately washed with water, soaked in ammonia or neutral carbonated soda aqueous solution, and then washed with neutral detergent or warm water. 2. The welding of the hardware shrapnel will change color when heated, wash it with 10% nitric acid or hydrofluoric acid solution, and then neutralize it with ammonia water, carbonated soda light solution, and then wash the stainless steel spring with water--specially used for washing medicine; organic carbide adheres and soaks in the heat The neutral detergent or ammonia solution is then used to scrub with a weak abrasive detergent. 3. Labels and films, wipe with warm water, weak detergent; dust and easy to remove scales, wash with rice, weak detergent or warm water; binder component, use alcohol or organic solution; surface contaminants of hardware shrapnel The caused rust, use nitric acid (10%) or abrasive scrubbing agent to scrub-use special scrubbing chemicals to cause excessive rainbow patterns, use scrubbing agent or oil, use warm water scrubbing agent when scrubbing