Cadmium plating method for metal product surface treatment

A surface treatment and cadmium plating technology, which is applied in the field of surface treatment of metal products, can solve problems such as unqualified and affecting product quality, and achieve the effect of product quality assurance and adhesion enhancement

Inactive Publication Date: 2015-01-07
GUIZHOU HANGRUI AVIATION PRECISION PARTS MFG
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  • Abstract
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Problems solved by technology

[0015] The purpose of the present invention is to solve the problem that the traditional surface treatment cadmium plating ...

Method used

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  • Cadmium plating method for metal product surface treatment

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Embodiment Construction

[0043] The specific embodiment described in the present invention is described as follows again:

[0044] Surface treatment cadmium plating process method step of the present invention:

[0045] Qualified products are chemically degreased (according to the steps in C below); when washing with hot water for the first time, wash with hot water at 50°C to 90°C, and after the first wash, wash at 10°C to 30°C Wash in clean water; dry, dry in an oven at 40°C to 80°C; loosen and tumbling, use a vibrating tumbling machine for tumbling; the second washing, wash in clean water at 10°C to 30°C; the first time Activation, (according to the following instructions); the third washing, cleaning in clean water at 10°C to 30°C; pre-plating with nickel; the fourth washing, cleaning in clean water at 10°C to 30°C; cadmium plating; fifth Washing with water for the first time in clean water at 10°C to 30°C; the first time for light emission to remove surface oxides; washing with water for...

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Abstract

A cadmium plating method for metal product surface treatment comprises steps of alkaline degreasing; first cleaning by hot water, and then cleaning by clear water with the temperature of 10 DEG C-30 DEG C; drying and baking in a drying oven at the temperature of 40 DEG C-80 DEG C; loosening and roller burnishing by a vibrating roller burnishing machine; second cleaning; first activating; third water washing; nickel preplating; fourth water washing; cadmium plating; fifth water washing; first bright dipping to remove surface oxide; sixth water washing; second cleaning by hot water; first spin-drying by a spin dryer for 5-10 minutes; hydrogen removal with the time of 6-8 hours; second activating; seventh water washing; second bright dipping; eighth water washing; passivating; ninth water washing, wherein water washing from the second time to the ninth time adopts clear water with the temperature of 10 DEG C-30 DEG C; third cleaning by hot water, wherein the temperature of hot water used by the first time, the second time and the third time is 50 DEG C-90 DEG C; second spin-drying for 5-10 minutes; ageing; inspecting; and packaging. The corrosion resistance test of a product is prolonged to be longer than 96 hours, and the quality is guaranteed.

Description

technical field [0001] The invention relates to a metal product surface treatment method, in particular to a novel metal product surface treatment cadmium plating method, which improves the corrosion resistance of the product and ensures product quality at the same time. Background technique [0002] Similar products in the early stage required a maximum of 48 hours for the salt spray test, and some products did not have clear requirements. Some products have higher requirements. Components and parameters in the traditional process: [0003] 1. Activation [0004] A. Main ingredients Hydrochloric acid: 35~60g / L [0005] B. Process parameters: T(°C): room temperature; [0006] t(min): 0.5~2. [0007] 3. Cadmium plating [0008] A. Main ingredients: cadmium oxide: 20~40g / l; [0009] Sodium cyanide: 90~150g / l; [0010] Sodium sulfate: 40~60g / l; [0011] Nickel sulfate: 1~1.5ml / l [0012] Sodium carbonate (Na2CO3.10H2O): ≤60g / l ...

Claims

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Application Information

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IPC IPC(8): C23C18/18C23C18/31
CPCC25D5/34C25D3/28C25D5/48C25D5/52
Inventor 王道益
Owner GUIZHOU HANGRUI AVIATION PRECISION PARTS MFG
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