The use of stainless steel has become more and more common with the development of economy. People are closely related to stainless steel products in their daily life. However, many people do not know much about the performance of stainless steel and think that stainless steel will never rust< br>
In fact, the good corrosion resistance of stainless steel is due to the fact that the surface of stainless steel forms a layer of purification membrane. In nature, it exists in the form of more stable oxide. However, although stainless steel has different oxidation levels according to different application conditions, it is finally oxidized. This phenomenon is usually called corrosion< br>
In the surface purification film of stainless steel products, the parts with weak corrosion resistance are subject to electrochemical or chemical reactions due to the metal surface exposed to the corrosive environment, thus forming pitting corrosion imagination and forming small holes. In addition, oxygen ions are close to each other, forming a strong corrosive solution to accelerate the speed of corrosion reaction< br>
In order to prolong the service life of stainless steel, the following points are summarized according to the classification and measures of possible corrosion phenomena of stainless steel:
1. Cleaning method
When cleaning the surface of stainless steel, pay attention not to scratch the surface, and prevent the use of bleach and abrasive washing liquid, steel ball, grinding tools, etc. to remove the washing liquid, rinse the surface with clean water after washing< br>
2. How to dispose of dust
If there is dust on the surface of stainless steel and it is easy to remove dirt, it can be washed with soap weak detergent. The adhesive composition shall be scrubbed with alcohol or organic solvent (ether, benzene)< br>
3. Grease
The grease on the surface of stainless steel is oily and greasy. After cleaning with a soft cloth, wash with neutral detergent or ammonia solution or special detergent< br>
4. Acid corrosion
The stainless steel surface is attached with bleach and various acids. Wash it immediately with water, then dip it with ammonia solution or neutral carbonated soda solution, and wash it with neutral detergent or warm water< br>
5. Appearance rainbow pattern
The appearance of stainless steel has rainbow pattern, which is caused by excessive use of detergent or oil. It can be washed away with warm water neutral detergent< br>
6. Adhesion rust
The rust caused by the dirt on the surface of stainless steel can be washed with 10% nitric acid or abrasive detergent, or with special washing drugs< br>