What are the surface treatments of stainless steel screws（二）

Sandblasting is using compressed air as the power, to form a high-speed jet beam of the spraying material (copper ore, quartz sand, emery, iron sand, sea sand) high-speed jet to be handles the workpiece surface, make the appearance on the surface of the workpiece surface appearance or shape change, due to the abrasive impact to the surface and the cutting effect, make the surface of the workpiece for cleanliness and different roughness, the workpiece can improve the mechanical properties of the stainless steel screws surface, thus improve the fatigue resistance of the workpiece, increase the adhesion between the coating and its, extend the durability of the coating, but also to the flow of paint and decoration.

Polishing process: oil removal — full washing — skin removal — polishing — full washing — 70-90℃ hot water immersion for 10 seconds — mechanical drying. Precautions for polishing stainless steel screws:

1. Water should be thoroughly washed between the three processes of oil removal, skin removal and polishing. After polishing, water should be thoroughly washed and then dried by rolling bucket.
2. Stainless steel screw surface only a small amount of oxide, carbide, oil can be removed, fully washed after direct polishing.
3. The cleaning agent is acidic to some extent. Wear rubber gloves during the cleaning operation.
4. Keep the water source at the cleaning site convenient, with smooth drainage and good ventilation.

Electrophoresis of general technological process: skim, skim, water washing, e.g. watch – phosphate – wash cycle – water – electrophoresis, after washing, baking. Note: stainless steel screws must be free of oil, rust and dust (mechanical dust) before entering the electrophoresis tank.

Passivation process: deoiling — rinsing — passivation — rinsing — sealing — drying.

General process of vacuum electroplating: product surface cleaning — destatic — spray primer — baking primer — vacuum coating — spray finish — baking finish — packaging.

If you want to know more about thestainless steel screws electroplating knowledge, welcome to call to consult Shi Shi Tong.

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