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tinplate packaging cans have become one of the most widely used packaging materials because of its lightness, strength and good sealing performance. Especially in outdoor environments, tinplate can effectively resist the damage of external substances to the contents, such as moisture, air and microorganisms.

Tinplate packaging cans that meet food grade standards are usually strictly tested to ensure that they can safely contact food and will not adversely affect the taste, nutritional content and safety of the food.

The taste and flavor of food are important indicators of its quality, and the packaging material directly affects the storage environment of the food. The coating of tinplate packaging cans is generally non-toxic and is strictly quality controlled.

Reasons why tinplate packaging cans are prone to corrosion: 1. The protective effect of the tin layer is limited ● Uneven thickness of the tin layer ● Scratches or damage to the tin layer ● Chemical reaction between the tin layer and the contents 2. Corrosion susceptibility of the steel substrate 3. The influence of the use environment on corrosion ● High humidity environment ● Acid and alkali environment ● High temperature environment ● Contact with different chemicals 4. Electrochemical corrosion ● Contact between different metals ● The presence of electrolyte solution

For the question of "Is tinplate packaging can flammable?", we can get the answer from the properties of its main materials. Generally speaking, metal materials are not flammable because they do not contain flammable components such as hydrocarbons

The black marks in tinplate cans are usually caused by corrosion of the can. When the metal in the can reacts with the acid in the food or environment, corrosion occurs, resulting in black marks in the can.