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Passivation treating agent for chromium-plating steel part

A technology of passivation treatment and electroplating chromium, applied in the direction of metal material coating process, etc., can solve environmental pollution and other problems, achieve the effect of low concentration, low production cost, and easy wastewater treatment

Active Publication Date: 2014-07-16
ANHUI HUAXING METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional passivating agent contains carcinogenic hexavalent chromium, which causes serious pollution to the environment, and is gradually replaced by the environmentally friendly trivalent chromium passivating agent

Method used

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  • Passivation treating agent for chromium-plating steel part
  • Passivation treating agent for chromium-plating steel part
  • Passivation treating agent for chromium-plating steel part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A passivation treatment agent for electrochrome-plated steel parts, consisting of the following components in mass percentage:

[0016]

[0017] The balance is tert-butanol.

Embodiment 2

[0019] A passivation treatment agent for electrochrome-plated steel parts, consisting of the following components in mass percentage:

[0020]

[0021]

[0022] The balance is tert-butanol.

Embodiment 3

[0024]

[0025] The balance is tert-butanol.

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PUM

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Abstract

The invention provides a passivation treating agent for a chromium-plating steel part, and relates to the technical field of chemical engineering. The passivation treating agent comprises the following components in percentage by mass: 3% of potassium hydroxide, 45% of chromium nitrate, 5% of n-octanal, 4% of graphene, 20% of malonic acid, 10% of oxalic acid, 3% of silica gel-loading zirconium sulfate and the balance of tertiary butanol. The passivation treating agent provided by the invention is long in using period, does not contain hexavalent chromium and hydrogen peroxide or other strong oxidants, facilitates wastewater treatment and is an environment-friendly passivation agent. The passivation treating agent is low in concentration and production cost, relatively economic and practical and capable of improving the salt mist resistance and corrosion resistance of a metal surface and prolonging the service life of the steel part.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a passivation treatment agent for electrochrome-plated iron and steel parts. Background technique [0002] Steel parts are usually passivated after chrome plating or hot chrome plating to prevent white rust in a short period of time. Because the chrome plating layer is easy to produce white rust in a humid environment, which seriously affects the appearance and service life, so steel parts usually need passivation treatment after chrome plating. The traditional passivating agent contains carcinogenic hexavalent chromium, causing serious pollution to the environment, and is gradually being replaced by the environmentally friendly trivalent chromium passivating agent. Early trivalent chromium passivators were made from chromic acid (Cr0 3 ) and reducing agent (such as potassium metabisulfite) reaction. Contents of the invention [0003] The technical problem to be so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/62C25D5/48
Inventor 张福友
Owner ANHUI HUAXING METAL
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