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7 types of surface treatment commonly we do for metal parts

Dec. 16, 2022

Xu Feng is a manufacturer focused on customized metal and plastic parts production, we take pride in supporting our clients with relevant industry information, and every month we cover topics related to our services and capabilities. Surface treatments are necessary processes for most metal parts we manufacture, which help to prevent corrosion and improve appearance, and some of these treatments also provide enhanced mechanical or electrical properties that contribute to the overall functionality of the component. In this article, we'll show 7 commonly used surface treatment types.


1, Anodizing

Anodizing is actually an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. Aluminium alloy is the ideal material which is suited to anodizing, although other nonferrous metals, such as magnesium and titanium, also can be anodized, it is seldom asked to do it.

7 types of surface treatment commonly we do for metal parts


Anodizing is accomplished by immersing the aluminium alloy into an acid electrolyte bath and passing an electric current through the medium. A cathode is mounted to the inside of the anodizing tank; the aluminium acts as an anode so that oxygen ions are released from the electrolyte to combine with the aluminium atoms at the surface of the part being anodized. There are two classifications, nature and colour, our company can provide various colours of anodizing.


2, Painting

Steel can't do anodizing, and instead, if you need different colours, Painting is a good choice. Usually, powder coating or spray painting is a requirement from the clients. To achieve the best results of the painting, the products need to be clean-free of oil, rust, dust, debris and so on. Anything left on your product prior to coating will affect the painting adhesion and finish, that's where pretreatment for painting needs. 


If the product you want to paint has a lot of debris(rust, laser scale, machining mark), then you will likely need a shot-blasting operation. if solvents, oils or chemical residue cover the products' surface, then pretreatment needs to be considered, washing the station with some chemical agent, such as iron and then using hot water to clean it.