The reasons for the corrosion of the packaging iron box recently summarized:
1. In a humid environment, yellow rust spots will be formed when the outer wall of the tank is in contact with oxygen in the air, which will cause corrosion of the outer wall of the can. If it is serious, it will cause the wall of the tank to perforate. Therefore, iron box manufacturers should avoid opening in a humid environment. After drinking it, it will cause harm to the human body after causing corrosion.
2. The corrosion of the inner wall of packaging tin cans is divided into two points: uniform corrosion (dissolved tin) and concentrated corrosion (dissolved iron-hydrogen swelling), including acidic uniform corrosion, concentrated corrosion, oxidation ring and abnormal detinning corrosion.
3. The main reasons for the discoloration of the inner wall of the packaging tin box produced by the tin box manufacturer are the local black spot corrosion and vulcanization corrosion of the tank wall. However, tin sulfide has a certain anti-corrosion effect on the tank wall and is harmless to human health, so a small amount of vulcanized glass is allowed on the inner wall of the tank.
4. The metal content of the tin box canned food packaged by the iron box manufacturer has exceeded the standard, metal taste, hydrogen expansion of the can, can wall perforation, food vulcanization pollution and rust on the outer wall of the can, etc. It will cause the canned food to lose its commodity value, and there will be health hazards to the human body.
