CN105369312A - Post-galvanization bright dipping liquid - Google Patents
Post-galvanization bright dipping liquid Download PDFInfo
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- CN105369312A CN105369312A CN201510789743.6A CN201510789743A CN105369312A CN 105369312 A CN105369312 A CN 105369312A CN 201510789743 A CN201510789743 A CN 201510789743A CN 105369312 A CN105369312 A CN 105369312A
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- bright dipping
- zinc
- plated
- galvanization
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Abstract
The invention discloses post-galvanization bright dipping liquid. 100 L of pure water contains 1-4 L of nitric acid with the concentration of 65%, 1-5 Kg of ammonium oxalate, 0.2-5 Kg of urotropine and 20-100 ml of wetting agents. The post-galvanization bright dipping liquid can effectively prevent over-corrosion of a galvanized layer, play a role in corrosion inhibition, chelate taken-in metal ions, and finally improve the corrosion resistance of the galvanized layer.
Description
Technical field
The invention belongs to technical field of chemistry and chemical engineering, particularly relate to zincincation technology.
Background technology
Zinc-platedly refer to that plated surface one deck zinc at metal, alloy or other material is to play the process for treating surface of the effect such as attractive in appearance, antirust.Concerning steel substrate, zinc coating belongs to anodic coating, and it is mainly used in the corrosion preventing iron and steel, and quality and the thickness of coating relation of its barrier propterty are very large.Current conventional zincincation is all through the zinc-plated protective layer that the steps such as electrochemical deoiling, electrolytic degreasing, acid activation, electro-galvanizing, bright dipping, passivation, oven dry obtain 2 ~ 20 micron thickness, through blue blunt or white passivation, solidity to corrosion can reach neutral salt spray test 72h usually, requires that higher environment is difficult to meet for solidity to corrosion; And, but environmental pollution large not environmental protection higher through the solidity to corrosion of sexavalent chrome chromatic passivation.As functional decoration part, zinc-plated protective layer also requires light, without hanging trace.
Summary of the invention
Goal of the invention: for above-mentioned existing Problems existing and deficiency, the object of this invention is to provide a kind of zinc-plated rear bright dipping treatment solution, can prevent zinc-plated excessive erosion, improve its corrosion resisting property.
Technical scheme: for achieving the above object, the present invention is by the following technical solutions: a kind of zinc-plated rear bright dipping treatment solution, in 100L pure water, containing following component: 1 ~ 4L concentration be 65% nitric acid, the ammonium oxalate of 1 ~ 5Kg, the urotropine of 0.2 ~ 5Kg and 20 ~ 100ml wetting agent.
As preferably, described wetting agent is poly(oxyethylene glycol) 400, tween-80, propylene glycol.
As preferably, in 100L pure water, add the component of following amount: 1L concentration be 65% nitric acid, the oxalic acid of 4Kg, the urotropine of 2.2Kg and 50ml poly(oxyethylene glycol) 400.
Beneficial effect: compared with prior art, the present invention effectively can stop the excessive erosion of zinc coating, plays corrosion inhibition, and the metal ion that complexing is brought into, the final solidity to corrosion improving zinc coating.
Embodiment
Below in conjunction with specific embodiment, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
In prior art, light-emitting solution is the dust technology of 0.5 ~ 2%, certain thickness zinc coating can be deposited through zinc-plated workpiece surface, but white mist vestige can be there is in this zinc coating, can play the effect of chemical rightenning after light-emitting solution is soaked, this process is actual is slight erosion is carried out on surface expose bright nanocrystalline zinc deposit.But this process, is generally manual operation, and light-emitting solution to change and impurity gets more and more along with working concentration, the problem such as easily cause excessive erosion bright dipping inadequate.The present invention is through lot of experiments: introduce ammonium oxalate and urotropine, can play corrosion inhibition, and ammonium oxalate also has complexing action simultaneously, the metal ion brought into is carried out complexing and avoids on coating, form scratches (more obvious after especially drying); Introduce polyglycol surfactants simultaneously, reduce surface tension, prevent scratches from occurring further.
Comparative example
In 100L pure water, add the nitric acid that 2L concentration is 65% successively, and stir and obtain light-emitting solution.At room temperature, the workpiece after zinc-plated, after 3 washings, immerses light-emitting solution 1 ~ 3s, at once takes out again after washing, carries out passivation aftertreatment, eventually pass oven dry.After neutral salt spray test 72h, Corrosion protection grade is 4 grades.
Embodiment 1
Add successively in 100L pure water 2L concentration be 65% nitric acid, the ammonium oxalate of 5Kg, the urotropine of 0.5Kg and 50ml polyoxyethylene glycol, and stir and obtain light-emitting solution.At room temperature, the workpiece after zinc-plated, after 3 washings, immerses light-emitting solution 1 ~ 3s, at once takes out again after washing, carries out passivation aftertreatment, eventually pass oven dry.After neutral salt spray test 72h, Corrosion protection grade is 8 grades.
Embodiment 2
Add successively in 100L pure water 2L concentration be 65% nitric acid, the ammonium oxalate of 1Kg, the urotropine of 4Kg and 50ml polyoxyethylene glycol, and stir and obtain light-emitting solution.At room temperature, the workpiece after zinc-plated, after 3 washings, immerses light-emitting solution 1 ~ 3s, at once takes out again after washing, carries out passivation aftertreatment, eventually pass oven dry.After neutral salt spray test 72h, Corrosion protection grade is 8 grades.
Embodiment 3
Add successively in 100L pure water 2L concentration be 65% nitric acid, the ammonium oxalate of 3Kg, the urotropine of 2Kg and 50ml polyoxyethylene glycol, and stir and obtain light-emitting solution.At room temperature, the workpiece after zinc-plated, after 3 washings, immerses light-emitting solution 1 ~ 3s, at once takes out again after washing, carries out passivation aftertreatment, eventually pass oven dry.After neutral salt spray test 72h, Corrosion protection grade is 9 grades.
Embodiment 4
Add successively in 100L pure water 2L concentration be 65% nitric acid, the ammonium oxalate of 4Kg, the urotropine of 2Kg and 50ml polyoxyethylene glycol, and stir and obtain light-emitting solution.At room temperature, the workpiece after zinc-plated, after 3 washings, immerses light-emitting solution 1 ~ 3s, at once takes out again after washing, carries out passivation aftertreatment, eventually pass oven dry.After neutral salt spray test 72h, Corrosion protection grade is 9 grades.
Claims (3)
1. a zinc-plated rear bright dipping treatment solution, is characterized in that, in 100L pure water, containing following component: 1 ~ 4L concentration be 65% nitric acid, the ammonium oxalate of 1 ~ 5Kg, the urotropine of 0.2 ~ 5Kg and 20 ~ 100ml wetting agent.
2. zinc-plated bright dipping aftertreatment fluid according to claim 1, is characterized in that: described wetting agent is poly(oxyethylene glycol) 400, tween-80, propylene glycol.
3. zinc-plated bright dipping aftertreatment fluid according to claim 1, is characterized in that: the component adding following amount in 100L pure water: 1L concentration be 65% nitric acid, the oxalic acid of 4Kg, the urotropine of 2.2Kg and 50ml poly(oxyethylene glycol) 400.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510789743.6A CN105369312A (en) | 2015-11-17 | 2015-11-17 | Post-galvanization bright dipping liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510789743.6A CN105369312A (en) | 2015-11-17 | 2015-11-17 | Post-galvanization bright dipping liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105369312A true CN105369312A (en) | 2016-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510789743.6A Pending CN105369312A (en) | 2015-11-17 | 2015-11-17 | Post-galvanization bright dipping liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105369312A (en) |
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2015
- 2015-11-17 CN CN201510789743.6A patent/CN105369312A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160302 |
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| WD01 | Invention patent application deemed withdrawn after publication |