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Automobile cast iron mold plating solution

A cast iron mold and plating solution technology, applied in the field of automobile cast iron mold plating solution, can solve the problems of electrode asymmetry, uneven surface, high cost, and achieve the effect of smooth surface

Active Publication Date: 2015-12-09
CHONGQING TAOYUAN METAL SURFACE TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing chrome plating has the disadvantages of electrode asymmetry, uneven surface, and high cost during electroplating. According to the improvement of the plating layer, the electroplating solution also needs to be improved accordingly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Raw materials: chromic anhydride with 99.9% content, sulfuric acid as analytically pure AR with 99.9% content, and sodium fluorosilicate as analytically pure AR with 99.0% content.

[0023] Configure the plating solution:

[0024] (1) configure a certain amount of pure water;

[0025] (2) pour into 250g / L chromic acid, stir until fully melted, then pour into 1.2g / L sulfuric acid, stir evenly under normal temperature;

[0026] (3) Pour 1.2g / L sodium fluorosilicate into the above solution, stir evenly, and then turn it on for use.

[0027] When in use, set the anode and cathode in the electroplating solution, pass through sufficient current intensity, electrons decompose the chromium in the electroplating solution, and precipitate and electroplate on the surface of the substrate.

Embodiment 2

[0029] Raw materials: chromic anhydride with a content of 99.8%, sulfuric acid as analytically pure AR with a content of 99.9%, sodium fluorosilicate as analytically pure AR with a content of 99.0%.

[0030] Configure the plating solution:

[0031] (1) configure a certain amount of pure water;

[0032] (2) Pour 200g / L of chromic acid into it, stir until completely melted, then pour into 0.8g / L of sulfuric acid, and stir evenly at room temperature;

[0033] (3) Pour 0.5g / L sodium fluorosilicate into the above solution, stir evenly and then turn it on for use.

[0034] When in use, set the anode and cathode in the electroplating solution, pass through sufficient current intensity, electrons decompose the chromium in the electroplating solution, and precipitate and electroplate on the surface of the substrate.

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PUM

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Abstract

The invention discloses an automobile cast iron die plating solution which is prepared from chromic acid of 200-250 g / L, sulfuric acid of 0.8-1.2g / L and sodium fluosilicate of 0.5-1.2g / L. The plating solution is chromium plating solution, large enough current and certain deposition time are applied to decompose chromium in the plating solution, and material surfaces are precipitated and plated. Plated products are smooth and flat in surface, material-saving and free of pollution to environment.

Description

technical field [0001] The invention belongs to the technical field of electroplating solutions for automobile cast iron parts and related parts, and particularly relates to an electroplating solution for automobile cast iron molds. Background technique [0002] Cars are increasingly developing in the direction of lowering prices, reducing emissions, reducing fuel consumption, increasing power, increasing comfort, and personalization. According to this demand, automotive cast iron parts and their molds need to have the characteristics of high strength, high toughness, precision, consistency, soundness, light weight, cleanliness and individuality. [0003] In order to improve the hardness of automobile cast iron molds, the surface is usually coated. Since chromium has high hardness, it is most suitable as an electroplating layer. The existing chrome plating has the disadvantages of electrode asymmetry, uneven surface, and high cost during electroplating. According to the imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/04C25D7/00
Inventor 符士正
Owner CHONGQING TAOYUAN METAL SURFACE TREATMENT