What Are The Surface Treatment Methods Of China Fasteners
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There are many surface treatment methods for China Fasteners, but many customers do not know how to choose the correct treatment method. Each type of screw surface treatment method is different, and the result is different. Today I will take you to know a few Screw surface treatment method, and how to choose the right one.
Screw surface treatment method 1: stainless steel
Screws that have been treated with stainless steel can usually be used directly after being washed, and the nuts only need to be polished and used directly.
Screw surface treatment method 2: electro-galvanized
The principle of this treatment method is electrolysis, the process of forming a uniform, dense and well-bonded metal or alloy deposit on the surface of stainless steel screws or nuts.
Screw surface treatment method 3: hot-dip galvanizing
Hot-dip galvanizing includes hot-dip galvanizing and hot-dip galvanizing. The common processing method is to immerse the galvanized material to be processed into the zinc bath. Due to the infiltration layer with the steel workpiece, the coating is thicker and has strong resistance to modification.
Screw surface treatment method 4: Dacromet
Dacromet's surface treatment method is a dispersed aqueous solution composed of zinc flakes, anhydrous chromic acid, and glycol. The screws and other fasteners are immersed in the solution, centrifuged, and then heated to the specified temperature in the oven. The Cr6+ is reduced by organic matter such as ethylene glycol to produce water-insoluble amorphous nCrO3-mCr2O3, which is used as a reducing agent to interact with the surface. Layers of laminated zinc flakes are combined to form a coating film. At the same time, the chromic acid in the solution passivates the metal surface to form a chemical bond, resulting in a strong bond.
Full Threaded Stud surface treatment method 5: Naraku treatment
The anti-loosening principle of anti-drop screws is to retain the resilience of engineering resin materials, so that bolts and nuts can generate strong friction by extruding engineering resin materials during the locking process, so as to achieve absolute resistance to the impact of the vibrator and completely solve the loosening of screws. The problem is that ordinary screws become permanent and strong anti-loosening screws.