What are the reasons for the corrosion of industrial aluminum?

1. SCC stress corrosion cracking performance of aluminum was found in the 20th century and in the early 1930s. SCC is characterized by the development of corrosion mechanical cracks along grain boundaries, and both can also extend across grains. Because the crack propagates in the metal, the strength of the metal structure decreases greatly, resulting in serious sudden damage. The damage under the combined action of metal stress and corrosive medium is called SCC.

2. Crevice corrosion crevice corrosion is a kind of local corrosion. For metal parts in electrolyte solution, due to the formation of metal to metal or gap, its width is enough to immerse in the medium, but the phenomenon of aggravating the internal corrosion gap between the metal and non-metal in the static state in the medium is called gap corrosion.

3. Also known as pitting corrosion resistance, pitting corrosion resistant holes produce local corrosion of metal in needle, dot and porous forms. The increase of solute concentration and solution temperature promote the corrosion of aluminum.

4. Uniform corrosion of aluminum in phosphoric acid and sodium hydroxide solution, the oxide film will dissolve, uniform corrosion will occur, and the dissolution rate is uniform. Pitting is a unique anodic reaction, which is an autocatalytic process, that is, the process conditions caused by corrosion are sufficient to maintain the pitting holes promoted and corroded.

Dongguan South America Aluminum Co., Ltd. (Huang Sheng 13249985858) is a high-quality Dongguan industrial aluminum manufacturer. It mainly produces various high-quality and precision industrial aluminum profiles, polished aluminum, aluminum tubes, aluminum rods, aluminum plates, capillaries, etc. its main brands include 6063, 6061, 6463, 6262, 6n01, 6082, 6060, 2011, 2017, 2024, 7005, 7075, 1070, 5052, 5056, etc. Welcome to inquire