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Stainless steel passivation technology

A stainless steel and process technology, applied in the field of stainless steel passivation process, can solve the problems of poor surface corrosion resistance, poor surface quality of workpiece, poor removal ability, etc., to improve corrosion resistance, solve poor anti-fingerprint pollution, and ensure decoration Effect

Inactive Publication Date: 2017-05-10
QINGDAO BOLIER MACHINERY EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] After stainless steel products are processed through processes such as machining, a large number of scratches, polishing marks, etc. will be produced on the surface, and there will be a large amount of oil stains, rust, grinding dust, etc. on the surface. The ability to remove scratches and polishing marks is poor, the anti-fingerprint performance of the workpiece surface is poor, and the surface corrosion resistance is poor, and the surface quality of the workpiece is poor

Method used

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Embodiment Construction

[0016] The present invention carries out according to the following processing steps:

[0017] 1) Degreasing: immerse the stainless steel workpiece in an alkaline degreasing solution at 50°C for 120 minutes;

[0018] 2) Deionized water washing: Soak the workpiece in deionized water for 5 minutes;

[0019] 3) Sandblasting: sandblasting the surface of the stainless steel workpiece, so that the surface roughness Ra of the treated stainless steel workpiece reaches 3.2;

[0020] 4) Deionized water washing: Soak the workpiece in deionized water for 5 minutes;

[0021] 5) Passivation: adjust the pH value of the passivation solution to 3-4, soak the workpiece in the passivation solution at room temperature for 20 minutes;

[0022] 6) Deionized water washing: Soak the workpiece in deionized water for 5 minutes to clean the passivation solution on the surface of the workpiece;

[0023] 7) Drying: Heat the deionized water to above 80°C, put the passivated workpiece in, soak for 8 minu...

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Abstract

The invention relates to a stainless steel passivation technology. The stainless steel passivation technology comprises the following steps: 1) degreasing: immersing a stainless steel workpiece in an alkaline degreasing solution for 120 min at the temperature of 50 DEG C; 2) washing by deionized water: immersing the workpiece in deionized water for 5 min; 3) sandblasting: performing sand-blast treatment on the surface of the stainless steel workpiece so that the surface roughness Ra of the processed stainless steel workpiece can reach 3.2; 4) washing by deionized water: immersing the workpiece in deionized water for immersion for 5 min; 5) passivating: adjusting the pH value of a passivating solution to 3-4, immersing the workpiece in the passivating solution at normal temperature for 20 min; 6) washing by deionized water: immersing the workpiece in the deionized water for 5 min, cleaning the passivating solution on the surface of the workpiece; and 7) drying: heating the deionized water to the temperature of more than 80 DEG C, placing the passivated workpiece, immersing the workpiece for 8 min and taking the workpiece out, and drying the workpiece in air. The above technical operation increases the corrosion resistance of the stainless steel workpiece and solves the problem of poor fingerprint pollution resistance on the surface of the stainless steel.

Description

technical field [0001] The invention relates to a surface treatment process for stainless steel, in particular to a passivation process for stainless steel. Background technique [0002] After stainless steel products are processed through processes such as machining, a large number of scratches, polishing marks, etc. will be produced on the surface, and there will be a large amount of oil stains, rust, grinding dust, etc. on the surface. The ability to remove scratches and polishing marks is poor, the anti-fingerprint performance of the workpiece surface is poor, and the surface corrosion resistance is poor, and the surface quality of the workpiece is poor. Contents of the invention [0003] The purpose of the present invention is to provide a stainless steel passivation process, which can improve the glossiness of the workpiece, remove scratches and polishing marks on the surface of the workpiece, and improve the corrosion resistance. [0004] The technical scheme of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/24C23C22/78
Inventor 张明亮王秀玲周城
Owner QINGDAO BOLIER MACHINERY EQUIP
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