What is the rust removal step before etching processing？

Ethymented processing iron, stainless steel, copper and other metals, especially iron SPCCs, can easily form a layer of rust on the surface. Must be processed.

Metal rust is a local or comprehensive corrosion behavior caused by the contact of acid or alkali in the metal and the environment. The most obvious phenomenon of rust is the common rust spots, and the rust spots are some insoluble metal oxides and salt. Rust

Round to the anti -corrosion layer and metal table

The combination of the surface, especially the thick structural loose rust. In order to ensure that the anti -corrosion layer has good adhesion on the metal surface, rust -removing treatment for rusting workpieces must be performed. The rust removal method is acid etching and alkaline etching. Aluminum and Taiwan

T's corrosion uses alkaline erosion,

The corrosion of copper and alloy, iron alloy and stainless steel uses acid erosion.

The metal materials currently used for etching have a flat surface. At the same time, these materials are protected when they leave the factory, and the rough materials will be pre -processed by mechanical methods, so rarely uses rust removal this alone. One process. The rust removal here refers to the local slight rust caused by the workpiece during processing, due to the long time or in the intermediate process, which is not cleaned during the intermediate process. She needs to be removed once she discovered, otherwise it will affect the subsequent process and even fail the product processing. This rust she only needs to find that the general section is lighter in time, but this kind of pot erosion will also form severe rust spots if it is not treated in time, and even mechanically treats the workpiece or need to be applied by the erosion point. For rust removal treatment in this case, if it is copper and Taiwanese or ordinary steel, it can be treated in hydrochloric acid or aspiring. It is also required to add corrosion aluminum and alloy in the rust removal liquid. After removing the oil, the candle is shouted for other materials, such as stainless steel, Qin, and other composite acidic solution with strong acidic acidic acid -resistant acidic acid solution for rust removal treatment.

Most of the acid solutions used in the rust removal process are working at room temperature. Its industrial I can be made of hard PVC or P material, and the rust removal process can also be shared with the pickling process. The removal of aluminum alloy surface marks can also be shared with aluminum alloy candles.