Process and special equipment for plating copper on special steel piece with deep/blind hole
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A special-shaped steel and copper plating technology, applied in electrolytic components, electrolytic processes, etc., can solve the problems of narrow current density range, cumbersome purchase, transportation, storage, and management.
Inactive Publication Date: 2011-01-12
CHANGAN AUTOMOBILE (GRP) CO LTD
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[0002] In the past, the surface anticorrosion treatment of special-shaped special steel parts with deep holes and blind holes has been using cyanide plating process. Although the ability of deep platin...
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Embodiment 1
[0115] Embodiment 1: A kind of process of copper plating on special-shaped steel parts with deep / blind holes-undercoating copper plating, its process is as follows:
[0116] Chemical degreasing, hot water washing, electrolytic degreasing, hot water washing, cold water washing, pickling, secondary cold water washing, neutralization, cold water washing, cyanide-free copper plating, secondary cold water washing, tin plating, secondary cold water washing, medium And, hot water washing, passivation, secondary hot water washing, hot pure water washing, alcohol dehydration, shaking off residual water, drying, inspection;
[0117] The chemical degreasing process uses a working tank made of 1Cr18Ni9Ti material, with a built-in serpentine steam heating tube. The chemical degreasing process solution composition and process parameters:
[0180] Embodiment two: a kind of technology-anti-carburizing copper plating on the special-shaped steel piece with deep / blind hole, its operation is as follows:
[0181] Chemical degreasing, electrolytic degreasing, hot water washing, cold water washing, pickling, cold water washing, neutralization, cold water washing, cyanide-free copper plating, cold water washing, compressed air drying, inspection;
[0182] The chemical degreasing process uses a working tank made of 1Cr18Ni9Ti material, with a built-in serpentine steam heating tube, the chemical degreasing process solution composition and process parameters:
[0187] The working tank used for the electrolytic degreasing is a stainless steel tank made of 1Cr18Ni9Ti material, with a built-in stainless steel anode plate, a serpentine stea...
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Abstract
The invention discloses a process for plating copper on a special steel piece with a deep/blind hole, namely render copper. The process comprises the following steps of: chemical deoiling, washing with hot water, electrolytic deoiling, washing with hot water, washing with cold water, acid washing, secondary washing with cold water, neutralizing, washing with cold water, plating copper without cyanide, secondary washing with cold water, plating tin, secondary washing with cold water, neutralizing, washing with hot water, passivating, secondary washing with hot water, washing with hot pure water, dehydrating with alcohol, removing the residual water, drying and inspecting, wherein electroplate liquid used in the step of plating copper without cyanide has the following formula: 400 to 600ml/L of BH-580 non-cyanide alkaline copper cylinder plating bath solution, 1 to 2ml/L of BH-580 non-cyanide alkaline copper brightening agent and 7.5 to 12g/L of metal copper; and the pH value is 9.2 to 9.8. The process has the advantages of good stability of a plating liquid, simple and convenient operation, good dispersibility and good covering capability; the formed plating layer has the advantages of fine and compact crystallization, good adhesive force, stable and reliable production; and the method can effectively protect environment and the physical and psychological health of operators.
Description
technical field [0001] The invention relates to a surface treatment method and equipment for metal products, in particular to a process and special equipment for copper plating on special-shaped steel parts with deep / blind holes, which are suitable for surface anti-corrosion treatment of special products to meet their long-term storage and maintenance requirements. use requirements. Background technique [0002] In the past, the surface anticorrosion treatment of special-shaped special steel parts with deep holes and blind holes has been using cyanide plating process. Although the ability of deep plating and refining coating grains is good, the allowable current density range is narrow, especially Yes, cyanide is a highly toxic chemical, and it is quite cumbersome to purchase, transport, store, and manage. The gas released during the cyanide electroplating production process is also poisonous, and the treatment of cyanide wastewater has extremely high requirements for safet...
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