The distinction is that the aluminum rust inside the pressure cooker is layered, whereas the aluminum rust on the pressure cooker’s bottom is grain-shaped. Alkaline carbonate is formed, and the zinc on the waste dry battery’s surface frequently reacts with the ammonium chloride paste inside the battery to produce something with a complex composition.ĭo you believe that if aluminum is protected by a dense oxide film, it will not rust? On the inside and outside of an old aluminum pressure cooker, there is white aluminum rust. It will only be slow in a low humidity environment. It quickly forms zinc hydroxide in humid air. Heated zinc, for example, will quickly react with oxygen to form zinc oxide. Zinc metal is more reactive, and rust comes in a variety of forms. Fall off quickly and continue to oxidize. When lead metal is exposed to oxygen, water vapor, and carbon dioxide in the air, its surface oxidizes quickly to form lead alkali carbonates (lead has several alkali carbonates), and the surface of this layer is very exposed to water.

Patina is primarily composed of basic copper carbonate. Green patina is formed when copper reacts with carbon dioxide and oxygen in a humid environment. The most common rust phenomenon occurs when iron products have been exposed to air for an extended period of time and undergo an oxidation reaction with oxygen, or they are corroded by oxygen in water to form oxides. It is easy to rust if both are available at the same time. Iron rust is caused by the reaction of oxygen and water in humid air, and it is associated with oxygen and water.

Handheld laser rust removal gun