Under What Environmental Conditions Will Copper Nuts Rust
In the copper automotive parts processing industry, the demand for the use of copper nuts is very large, so copper nut processing is the most well-known one. I believe that the first reaction many people hear when copper nuts will rust is "Copper Rusty, rust is not copper, it may be a problem with copper quality. "In the view of the editor of high-strength standard parts, in fact, this is our lack of certain understanding of copper, copper will also rust under certain conditions , Like the following situations:
Ⅰ.In contaminated air (such as an atmosphere containing many sulfides, carbon oxides, and nitrogen oxides), condensed water will form liquid spots of sulfuric acid, nitric acid, and acetic acid, causing chemical corrosion.
Ⅱ.The surface of the copper nut contains acids, alkalis, and salts (such as alkali water and lime water splashing on the decorative wall), causing local corrosion.
Ⅲ.Organic matter juice (such as melon and vegetable, noodle soup, sputum, etc.) adheres to the exterior of the car parts. Under the condition of water and oxygen, it forms an organic acid, and the organic acid will corrode the metal surface for a long time.
Ⅳ.The surface of the copper nut has deposits containing dust or other kinds of metal particles containing other metal elements. In humid air, the condensate between the deposits and the copper connects the two into a micro battery, which initiates an electrochemical reaction. The protective film is damaged, which is called electrochemical corrosion.
The size of the corrosion resistance of copper car parts processing is not rusty, which changes with the chemical composition of the steel itself, the mutual state, the operating conditions and the type of environmental medium. Therefore, in the early stage of production, we should control the corrosion and rust of copper nuts, and pay attention to the maintenance and application environment of the products to prevent the loss caused by the rust of the nuts.