How to understand the etching process in the anti-corrosion technology

Anti-corrosion technology is through photochemical phasing technology, screen printing technology, graphic plating technology, laser photolithography and engraved corrosion-resistant layer technology and other methods, will be selected to copy the graphic to the need to etch the surface of the metal parts, the formation of a layer of corrosion can be prevented by a blocking layer, usually called the corrosion-resistant layer. This process can also be called a graphic transfer process.

Etching in the graphic transfer according to the method used can be divided into: direct graphic transfer and indirect graphic transfer of two kinds.

Direct graphic transfer refers to: the photographic plate graphic or has made a good graphic screen plate, through the photochemical imaging technology or screen printing technology, direct the required graphics, transfer to the surface of metal parts of a method. This method is suitable for: can be directly sensitized or screen printing of the plane or column surface of the transfer of graphics.

Indirect graphic transfer refers to: the need to transfer the graphic, first through the photochemical phase technology or screen printing technology, transferred to a flexible carrier, and then through this carrier will be transferred to the surface of the parts. This method is suitable for spherical surfaces, or other parts with complex surface shapes that cannot or are difficult to directly sensitize or screen print. This method is widely used in the etching of shaped mold patterns.

Pad printing also belongs to a kind of indirect graphic transfer, when the batch is large, but also through the pad printing graphic transfer parts, is very suitable for a high-efficiency transfer method.