The stainless steel screws we commonly use are all white on the surface, which is actually the original color of the stainless steel screws. After the production is completed, only a simple cleaning is done. So can stainless steel screws be electroplated on the surface like carbon steel screws?

In theory, stainless steel screws can also be electroplated on the surface. Why are there few such electroplated stainless steel screws on the market? There are three reasons. The first reason is that the stainless steel screw itself has good anti-corrosion performance. There is no need to perform other electroplating treatments to improve its anti-corrosion performance. After electroplating, it will only make the surface anti-corrosion time shorter and shorter, so stainless steel The screws do not need to be processed in the use requirements. The second is that the market does not have much demand for this special requirement, and few companies will use such stainless steel screws. The third is technical reasons. Stainless steel screws are different from carbon steel screws. It is not easy to coat stainless steel screws with zinc or nickel. The equipment and technology required are very demanding. The market When the demand is low, no one will invest in this type of production line.

So in addition to this electroplating process, what are the surface treatments of stainless steel screws? The surface treatments we will talk about below are some of the processes often used in stainless steel screws.

Stainless steel screws require surface sandblasting in many cases. Its function is actually to brighten the surface of the screw. In the production process of stainless steel, some black oxide skin is prone to appear. After sandblasting, the screw can be brighter.

Color processing. You may have to ask. Didn’t it just say that plating black nickel on the surface is difficult and there is no need? In fact, the color treatment we are talking about is not in the electroplating coloring process, but is like painting. It is a chemical reaction. After some chemical colors are applied to the surface of the screw, the color of the stainless steel screw can be changed after the reaction.

Welding treatment. Welding treatment is actually not very common on stainless steel screws. Generally, they are some large eyebolts or eyebolts. Because of the difficulty of forging, they can only be designed as a component, and then the threaded part and the lifting ring are connected by welding. Get up, and then use a grinder to smooth the solder joints. So stainless steel screws can actually be welded.

Pickling treatment. After the stainless steel screw is extended for a long time, some black lines will be produced in the thread gap. In order to ensure that these black lines will not continue to deteriorate, the stainless steel screws can be soaked with some detergent to wash them off.

Passivation treatment. Passivation treatment is very common in the application of stainless steel screws. The passivation treatment has many benefits. It can remove stains, improve the smoothness and brightness of the screw, and can also form a protective film on the surface of the stainless steel screw, which can improve the anti-corrosion performance of the stainless steel screw.

After the above analysis, in fact, there are many surface treatment processes applied to stainless steel screws. Therefore, when you look at an ordinary stainless steel screw and hold it in your hand, many people think that it is a material that is extruded by a mold. In fact, behind the invisible, it has gone through a lot of craftsmanship to complete.