Anticorrosion Technology Of Tinplate Food Cans

Food cans using tinplate as raw materials mainly include three-piece cans, food cans and biscuits, tea cans, etc. The corrosion resistance level of food cans is directly related to the quality and shelf life of the contents, but there are many types of contents and storage regulations. Different from each other, a new research topic has been proposed for food can manufacturers. Understanding and mastering the basic knowledge of corrosion resistance of food cans has real-life guiding significance for production and manufacturing.

1. Resistance to sulfur corrosion is for tinplate food cans containing protein-containing foods such as poultry, livestock, aquatic products, etc., because during the production, processing, bottling, and storage processes in the canning factory, the protein is decomposed and easily causes vulcanized rubber to corrode. , in severe cases, vulcanized rubber spots and iron sulfide may occur, causing damage to the contents. Therefore, this kind of food can needs to be sulfur resistant.

2. When anti-acid corrosion agents are used to package food cans containing fresh fruits, tomatoes, cucumbers and other fruit and vegetable contents with strong acidity and alkalinity, the alkaline substances should avoid re-corrosion of the tinplate. Therefore, this type of food cans need to have acid suppression capabilities.

3. Resistance to corrosion by aqueous solutions For general liquid-containing material contents, in addition to considering acid suppression and sulfur resistance, immersion corrosion in aqueous solutions should also be avoided. Therefore, this type of food can needs to be resistant to corrosion by aqueous solutions.

4. Anti-rust During the validity period of canned food, tinplate is constantly facing the challenge of air oxidation and rust. Therefore, food cans need to be corrosion-resistant.echnically adjusted.