T/CSEA 22-2022 Pump barrel nickel-carbide composite electroplating technical specification for oil pump

Scope

Main Technical Content: 4. Technical Requirements 4.1 The surface quality of the base material before electroplating shall comply with the requirements of GB/T 12611. The roughness of the inner surface of the pump cylinder shall not exceed Ra0.4 μm. 4.2 Appearance 4.2.1 The main surfaces shall be polished after processing according to the process, with uniform color and fine texture. There shall be no defects such as peeling, bubbling, pitting, pinholes, exposed plating, chipped edges, or scratches. 4.2.2 Other surface coatings (including outer surfaces, internal and external threads, flanges, and end faces) shall not require electroplating under normal circumstances, provided that they are smooth and free from visible defects. However, if the customer requests and specifies in the documents, the product may undergo composite plating treatment at the above-mentioned positions. The plating layer shall meet the requirements of 4.2.1, and the threads, flanges, and end faces shall not be corroded. 4.3 Coating Thickness 4.3.1 The coating thickness on the main surfaces of different base materials shall meet the requirements of Table 1. Table 1: Coating Type and Thickness for Different Base Materials Coating Type Coating Thickness Base Material Base Yield Strength C1 ≥ 0.033 mm Medium-low carbon steel (1020, 1026, 1045, etc.) ≥ 414 MPa C2 ≥ 0.033 mm Low-alloy steel (30CrMo, 42CrMo, etc.) ≥ 345 MPa C3 ≥ 0.033 mm Ferritic steel (1Cr5Mo) ≥ 483 MPa C4 ≥ 0.033 mm Naval brass (C44300) ≥ 345 MPa D1 ≥ 0.076 mm Medium-low carbon steel (1020, 1026, 1045, etc.) ≥ 414 MPa D2 ≥ 0.076 mm Low-alloy steel (30CrMo, 42CrMo, etc.) ≥ 345 MPa D3 ≥ 0.076 mm Ferritic steel (1Cr5Mo) ≥ 483 MPa D4 ≥ 0.076 mm Naval brass (C44300) ≥ 345 MPa 4.4 Adhesion Strength The coating shall adhere firmly to the base material without peeling, bubbling, or flaking. 4.5 Coating Hardness The coating hardness shall meet the requi

Development Information

Related Standards