What is the purpose of stainless steel surface treatment

What is the purpose of stainless steel surface treatment

Dalian metal surface treatment mainly aims to remove oil and dirt. Its main components are sodium carbonate, sodium metasilicate, etc., and anionic surfactants or dispersants are added to make industrial cleaning agents. Machines such as ultrasonic machines are used to remove impurities. The shortcomings of this treatment agent are mainly reflected in the complex processing process, which requires heating the treatment agent and consumes a large amount of water resources; At the same time, cleaning takes a relatively long time. It mainly forms a phosphating film on the outer surface of the metal through the joint action of substances such as phosphoric acid and surfactants. It can not only achieve the purpose of oil and rust removal, but also isolate air and achieve the purpose of rust prevention.

Immerse the stainless steel rivet components to be electroplated in an aqueous solution containing the deposited metal compound, and use an electric current to pass through the plating solution, causing the electroplated metal to precipitate and deposit on the components. The result is that the iron zinc alloy on the surface of the steel parts gradually becomes passive zinc on the outer surface of the product. Hot dip aluminum plating is a similar process.

Dalian Metal Surface Treatment Hot Dip Galvanization is the opposite, with thicker coatings depositing at the inner corners and bottom of the threads. The metal deposition tendency of mechanical plating is the same as that of hot dip plating, but it is smoother and has a much more uniform thickness on the entire surface. When there are small solid particles in the plating solution, they become the catalytic reduction center. The main salt metal ions in the plating solution, which are not high in content, are quickly reduced and consumed not on the workpiece but on these particles, and the plating solution will quickly fail and be scrapped. Sometimes it is necessary to thicken the coating, resulting in a decrease in production efficiency and an increase in costs; Various large mechanical particles cause burrs and roughness in the coating, which requires rework.

Only by maintaining a high level of cleanliness of the plating solution can we reduce malfunctions, reduce rework, improve quality, reduce overall costs, and enhance market competitiveness. During the spraying process, different types of stresses are generated when the sprayed particles solidify on the substrate surface, which can affect the strength and bonding strength of the coating itself. Removing moisture and activating the surface is beneficial for the bonding between the coating and the substrate, as well as controlling the expansion of the substrate relative to the coating.

Dalian Metal Surface Treatment controls the substrate temperature. For iron based powders, controlling the substrate temperature before spraying and preheating to around 150oC can enable the analysis of carbide phases in the coating and improve its wear resistance. Due to the purity of the new layer, it is not easily corroded in acidic or alkaline environments. Effectively protect the steel body for a long time. Zinc coating has good ductility and will not easily fall off during various bending, handling, impact, etc.