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31 2026.03

3.1 General Inspection1. Review of accompanying technical documents and certificate of quality2. Visual Inspection1. Whether the supplier identification and property class marking are applied as requi...

30 2026.03

Typical Processing Routes

1. Small-Specification Bolts Below Class 8.8 (M16 and Below)· Raw Material Selection: Low-carbon steel· Blank Forming Method: Cold heading· Thread Forming: Thread rolling or thread chasing (criteri...

05 2026.03

Dacromet is a new type of surface treatment technology

Dacromet is a new type of surface treatment technology. Compared with traditional electroplating processes, Dacromet is considered a "green plating" technology. Its advantages are as follows...

05 2026.03

Dacromet

Zinc (Aluminum) Chromium Coating, also known as Dacromet, Dacrust, or Dicron. It is domestically named Zinc-Chromium Coating, which is a new type of anti-corrosion coating mainly composed of zinc powd...

01 2026.02

Surface Treatment

Surface treatment is a process method that artificially forms a layer on the surface of a base material, possessing mechanical, physical, and chemical properties different from those of the substrate....

31 2026.01

Hot-Dip Galvanizing

Degreasing → Oil removal, Water rinse → Alkali removalPickling → Rust removal and activation, Water rinse → Acid removalFlux application, Drying → Facilitates zinc coatingGalvanizing, Zinc spinni...

26 2025.12

II. Fastener Manufacturing Process (4)

2.2.8 Heat TreatmentHeat treatment is a comprehensive technological process in which materials are heated, held at temperature, and cooled within a specific medium to control their properties by alter...

25 2025.12

II. Fastener Manufacturing Process (3)

2.2.6 TurningTurning is a type of machining that primarily uses lathes to perform cutting operations on work piece blanks to achieve the desired workpiece profile.Turning operations include lathe cutt...

28 2025.11

II. Fastener Manufacturing Process (2)

2.2.3 Pickling, Phosphating, and SoapingEquipment: Pickling tank, water rinsing tank, phosphating tank, soaping tank.Purpose of Pickling: To remove the oxide layer and rust from the surface of the wir...

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