Shanghai Autra Precision Surface Treatment Co., Ltd.

Automotive & components

Focus on wear, friction, corrosion and dimensional change of mating surfaces. Heat treatment may affect the substrate or coating; state any limits at the evaluation stage.

Where automotive parts are used

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Vehicle system locations with twelve types of surface-treated parts labeled
Vehicle system locations with twelve types of surface-treated parts labeled
No. in figure / part Location of use Coating in original data Application purpose & items to check
01 Brake piston Wheel brake Ni-P Wear resistance
02 Belt tensioner Engine accessory belt Ni-P Wear resistance
03 Brake wheel cylinder Wheel brake system Ni-P Wear resistance
04 Clutch hub Manual transmission system Ni-P Sliding, wear resistance
05 Turbine rotor Engine boost system Ni-P Magnetism descriptions in the original are inconsistent; to be confirmed
06 ABS accumulator assembly Brake hydraulic control unit Ni-P Sliding, corrosion resistance; original part name to be confirmed
07 Carburetor Conventional engine fuel supply system Ni-P Corrosion resistance; not a common configuration in modern vehicles
08 Differential gear washer Inside the differential Ni-P + PTFE Sliding, noise reduction
09 Shift fork Inside the manual transmission Ni-P + SiC Wear resistance
10 Roller bracket Fuel injection control mechanism Ni-P Wear resistance, rust prevention, dimensional accuracy
11 Compressor wheel Engine intake and exhaust systems Ni-P Hardness, corrosion and wear resistance; original EGR/turbocharging use to be confirmed
12 Aluminum impeller A/C compressor mechanism Ni-P-B Sliding, hardness, wear resistance; vehicle-specific layout to be confirmed

Parts and coating directions are compiled from the original website application cases. Positions in the figure are reconstructed by system relationship; this does not mean any one vehicle model uses all these parts. Specific coated surfaces, dimensions, tolerances and thickness are confirmed per part drawing.

Application needs

Focus on wear, friction, corrosion and dimensional change of mating surfaces. Heat treatment may affect the substrate or coating; state any limits at the evaluation stage.

Part types open for discussion

Pistons, transmission parts, shafts and aluminum alloy sliding parts. This is an application evaluation direction and does not indicate that any specific customer project has been undertaken.

Prepare before evaluation

Mating material, lubrication conditions, load, temperature, heat-treatment limits, batch size and acceptance conditions.

From requirement to verification

  1. Submit drawings stating the substrate, quantity and operating conditions.
  2. Engineers check pretreatment, coating system, thickness and assembly requirements.
  3. Arrange sample verification as needed, and confirm quotation and acceptance conditions.

Submit drawings to discuss a processing solution →

Find chemicals & coating performance →

Source: company technical documents ↗ · compiled: 2026-09-18