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Composition of high-corrosion-resistance blue zinc-nickel alloy passivator

A zinc-nickel alloy, high corrosion resistance technology, applied in the direction of metal material coating process, etc., can solve the problems of passivation film color shedding, low corrosion resistance effect, uneven color distribution, etc., to achieve low cost, reduce cost and reduce cost. Effect

Inactive Publication Date: 2020-08-04
常州新纪元材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Under the current technical background, if steel parts want to achieve better corrosion resistance, it is generally through electroplating zinc-nickel alloy, and by sacrificing the zinc-nickel alloy layer to prevent corrosion and protect the steel parts, a single zinc-nickel alloy The corrosion resistance of the coating is not sufficient. The blue passivation agent for zinc-nickel alloy on the market is complex in composition and the corrosion resistance effect is not high. At the same time, the blue passivation film often suffers from color loss and uneven color distribution. Disadvantage, in addition, the production of zinc-nickel alloy blue passivator requires high temperature insulation production

Method used

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  • Composition of high-corrosion-resistance blue zinc-nickel alloy passivator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Agent A (set according to the configuration of 1 liter of agent A):

[0026] Cobalt nitrate: 200 grams;

[0027] Sodium nitrate: 130 grams;

[0028] The balance is deionized water.

[0029] B agent (set according to the configuration of 1 liter B agent):

[0030] Caustic soda: 130 grams;

[0031] Oxalic acid: 110 grams;

[0032] Sodium citrate: 15 grams;

[0033] Chromium chloride: 260 grams;

[0034] The balance is deionized water.

[0035] Configuration method:

[0036] Configure 1 liter of blue passivation agent A, prepare a 1 liter beaker, weigh 200 grams of cobalt nitrate and put it in the beaker, weigh 130 grams of sodium nitrate and put it in the beaker, then add 800 grams of water, stir and dissolve thoroughly, Add water to the liquid level of 1 liter, stir well and complete the configuration of blue passivator A agent.

[0037] Configure 1 liter of blue passivator B agent, prepare a 1 liter beaker, prepare 700 grams of water, weigh 260 grams of chromiu...

Embodiment 2

[0040] Agent A (set according to the configuration of 1 liter of agent A):

[0041] Cobalt sulfate: 200 grams;

[0042] Sodium chloride: 130 grams;

[0043] Sodium sulfate: 15 grams;

[0044] The balance is deionized water.

[0045] B agent (set according to the configuration of 1 liter B agent):

[0046] Caustic soda: 130 grams;

[0047] Oxalic acid: 120 grams;

[0048] Citric acid: 10 grams;

[0049] Chromium chloride: 250 grams;

[0050] The balance is deionized water.

[0051] Configuration method: (same as embodiment 1)

[0052] Instructions:

[0053] 1) Rinse the steel workpiece that has just been plated with zinc-nickel alloy with clean water, and there should be no oil on the surface;

[0054] 2) Immerse the zinc-nickel alloy-plated workpiece above in a dilute acid solution for activation for 10-15 seconds, and then rinse it with clean water;

[0055] 3) Put the activated zinc-nickel alloy workpiece into the zinc-nickel blue passivation solution for 30-50 se...

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Abstract

The invention discloses a composition of a high-corrosion-resistance blue zinc-nickel alloy passivator. The composition comprises an agent A and an agent B. The agent A comprises cobalt salt, sodium salt and deionized water. The cobalt salt is a mixture of one or more kinds in cobalt nitrate, cobaltous sulfate, cobaltous sulfate and cobalt carbonate. The sodium salt in the agent A is a mixture ofone or more kinds in sodium selenite, sodium nitrate, sodium sulfate and sodium chloride. The agent B comprises chromium salt, alkali, acid, sodium salt and deionized water. The chromium salt in the agent B is a mixture of one or more kinds in chromic nitrate, chromic chloride and chromium sulfate. The alkali in the agent B is a mixture of one or more kinds in sodium hydroxide, potassium hydroxideand chromic hydroxide. The acid in the agent B is a mixture of one or more kinds in citric acid, citric acid, malonic acid, oxalic acid and ethane diacid. The sodium salt in the agent B is a mixtureof one or more kinds in sodium oxalate, sodium binoxalate, sodium citrate, sodium lactate and sodium sulfate.

Description

technical field [0001] The invention relates to the technical field of electroplating zinc-nickel alloy blue passivator, in particular to the composition of a highly corrosion-resistant blue zinc-nickel alloy passivator. Background technique [0002] Under the current technical background, if steel parts want to achieve better corrosion resistance, it is generally through electroplating zinc-nickel alloy, and by sacrificing the zinc-nickel alloy layer to prevent corrosion and protect the steel parts, a single zinc-nickel alloy The corrosion resistance of the coating is not sufficient. The blue passivation agent for zinc-nickel alloy on the market is complex in composition and the corrosion resistance effect is not high. At the same time, the blue passivation film often suffers from color loss and uneven color distribution. Disadvantage, in addition, the production of zinc-nickel alloy blue passivator requires high temperature and heat preservation production. Contents of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/48C23C22/46C23C22/60C23C22/68
CPCC23C22/46C23C22/60C23C22/68C23C2222/10C25D5/48
Inventor 闫新超
Owner 常州新纪元材料科技有限公司
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