A kind of surface treatment method of stainless steel

A surface treatment, stainless steel technology, applied in surface reaction electrolytic coating, ion implantation plating, anodizing and other directions, can solve the problem of single color of stainless steel surface treatment, and achieve the effect of rich appearance color and low cost

Inactive Publication Date: 2016-05-04
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies in the prior art referred to above, the present invention provides a low-cost stainless steel surface treatment method to solve the current situation of single color of stainless steel surface treatment

Method used

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  • A kind of surface treatment method of stainless steel

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Experimental program
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Effect test

Embodiment 1

[0041] Pre-plating treatment of stainless steel substrates: conventional stainless steel metal surface pretreatment methods;

[0042] Electroplated aluminum film: the electroplating solution contains AlCl 3 The concentration is 150g / L, the HCl concentration is controlled at 0.5mol / L, the applied DC voltage is 3.0V, and the current density is 15A / dm 2 ;

[0043] Aluminum anodizing to form Al 2 o 3 membrane. The steps of the aluminum anodizing treatment include:

[0044] Step 1, use alkaline degreasing solution to degrease and degrease the surface of aluminum film, and carry out chemical polishing with acid polishing reagent to remove the oxide layer Al on the surface of aluminum film 2 o 3 , the alkaline degreasing solution is 0.1mol / L NaOH solution, the soaking temperature is 40°C, and the soaking time is 5min; the acidic polishing reagent contains H 3 PO 4 Concentration is 8.0mol / L, H 2 SO 4 The concentration is 3.5mol / L, and polishing is performed at room temperatu...

Embodiment 2

[0050] Pre-plating treatment of stainless steel substrates: conventional stainless steel metal surface pretreatment methods;

[0051] Electroplated aluminum film: the electroplating solution contains AlCl 3 The concentration is 170g / L, the HCl concentration is controlled at 1.5mol / L, the applied DC voltage is 4.0V, and the current density is 7.0A / dm 2 ;

[0052] Aluminum anodizing to form Al 2 o 3 membrane. The steps of the aluminum anodizing treatment include:

[0053] Step 1, use alkaline degreasing solution to degrease and degrease the surface of aluminum film, and carry out chemical polishing with acid polishing reagent to remove the oxide layer Al on the surface of aluminum film 2 o 3 , the alkaline degreasing solution is 0.3mol / L NaOH solution, the soaking temperature is 60°C, and the soaking time is 2min; the acidic polishing reagent contains H 3 PO 4 Concentration is 10.0mol / L, H 2 SO 4 The concentration is 4.0mol / L, and polishing is performed at room tempera...

Embodiment 3

[0059] Pre-plating treatment of stainless steel substrates: conventional stainless steel metal surface pretreatment methods;

[0060] Electroplated aluminum film: the electroplating solution contains AlCl 3 The concentration is 190g / L, the HCl concentration is controlled at 2.5mol / L, the applied DC voltage is 6.0V, and the current density is 1.0A / dm 2 ;

[0061] Aluminum anodizing to form Al 2 o 3 membrane. The steps of the aluminum anodizing treatment include:

[0062] Step 1, use alkaline degreasing solution to degrease and degrease the surface of aluminum film, and carry out chemical polishing with acid polishing reagent to remove the oxide layer Al on the surface of aluminum film 2 o 3 , the alkaline degreasing solution is 0.5mol / L NaOH solution, the soaking temperature is 80°C, and the soaking time is 0.25min; the acidic polishing reagent contains H 3 PO 4 Concentration is 13.0mol / L, H 2 SO 4 The concentration is 5.0mol / L, and the polishing is carried out at roo...

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Abstract

The invention discloses a stainless steel surface treatment method. A surface of a stainless steel base material subjected to physical leveling, oil removal and derusting is electroplated with an aluminum film and then subjected to aluminium anodic oxidation treatment, in order to form an oxide-film. The anodic oxidation treatment comprises steps of alkali degreasing, chemical polishing, alkali corrosion, Al2O3 film formation through electrolysis, chemical dyeing and hole sealing. The method provided by the invention enriches appearance color of the stainless steel, solves the current situation of single color in stainless steel surface treatment, so that a stainless steel workpiece can be directly used as an appearance member with low cost. After surface treatment, the stainless steel gains large resistivity, and is almost non-conducting and suitable for electronic components requiring non-conductivity.

Description

technical field [0001] The invention relates to the field of metal surface treatment, in particular to a surface treatment method for stainless steel. Background technique [0002] At present, the general surface treatment technology of stainless steel includes sandblasting / wire drawing, PVD and electrophoresis. [0003] Sand blasting uses compressed air as the power to form a high-speed jet beam to spray the spray material (copper ore sand, quartz sand, corundum, iron sand, Hainan sand) to the surface of the workpiece to be treated at high speed, so that the outer surface of the workpiece surface looks or The shape changes, which increases the adhesion between the workpiece surface and the coating, prolongs the durability of the coating film, and is also conducive to the leveling and decoration of the coating. Wire drawing is a technical processing method in which the aluminum plate is used as the base material, and the metal is forcibly passed through the mold under the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F17/00C25D11/04C25D11/18C23C14/16
Inventor 曾元清
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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