CN1204208C - Zinc-chromium composite coating corrosion-proofing technique - Google Patents
Zinc-chromium composite coating corrosion-proofing technique Download PDFInfo
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- CN1204208C CN1204208C CN 02109307 CN02109307A CN1204208C CN 1204208 C CN1204208 C CN 1204208C CN 02109307 CN02109307 CN 02109307 CN 02109307 A CN02109307 A CN 02109307A CN 1204208 C CN1204208 C CN 1204208C
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Abstract
The present invention relates to a method for treating the corrosion of metallic surfaces, particularly to a method for treating the corrosion of surfaces of large-sized metal members, such as electric power towers, various lamp posts, freeway guardrail plates, fluid conveying pipelines, etc., namely a zinc chrome composite coating corrosion-proof technique. The present invention is characterized in that the bottom layer of a zinc chrome composite coating is a modified zinc chrome coating, and the surface layer is an organic coating; the modified zinc chrome coating adopts the technology of coating and baking. The present invention solves the problem of the long-term corrosion of metallic surfaces in the atmospheric environment, and especially solves the surface corrosion treating difficulty and the problem of low quality of large-sized members, such as electric power towers, various lamp posts, freeway guardrail plates, fluid conveying pipelines, etc. Because the zinc chrome composite coating is adopted, the cost on the treatment of the corrosion of metallic surfaces is largely lowered, the corrosion-proof performance of metallic surfaces is enhanced by 3 to 5 times, and the corrosion-proof performance is enhanced. The present invention has obvious economic benefit and great social benefit.
Description
Technical field the present invention relates to the method that a kind of metal surface anticorrosive is handled, particularly method---the Zinc-chromium composite coating corrosion-proofing technique of handling at the surface anticorrosive of large-scale hardwares such as electric tower, all kinds of lamp stand, motorway protective rail plate, fluid-transporting tubing.
What background technology adopted usually to the method for the long-term anti-corrosive treatment of metallic surface atmospheric environment medium at present both at home and abroad is that metallic substance is carried out surface treatment,, all the other be water as: paint spraying, plastic-blasting, spray zinc, aluminium-plated, aluminium-plated magnesium alloy, spray aluminium zinc etc., this method can't reach the long-term corrosion protection.In recent years the metal surface anticorrosive treatment technology is received domestic and international concern, domestic pot galvanize, hot-dip aluminizing and hot dip aluminum plating etc. the technology that adopts that develops into, only be limited in the surface treatment of micro metal member, the fluid delivery pipeline adopts methods such as PVC is compound, Resins, epoxy, sand-cement slurry.External situation is roughly the same, but has adopted Dacromet Technology (DACROMAT) to make the surface anticorrosion etching technique of large-scale hardware reach a new height in recent years.
Summary of the invention the objective of the invention is to prolong the work-ing life of metallic substance for metal construction is not corroded, and the method that a kind of metal surface anticorrosive that provides is handled, particularly method---the Zinc-chromium composite coating corrosion-proofing technique of handling at the surface anticorrosive of large-scale hardwares such as electric tower, all kinds of lamp stand, motorway protective rail plate, fluid-transporting tubing.
Zinc-chromium composite coating corrosion-proofing technique content Description of the present invention:
Zinc-chromium composite coating corrosion-proofing technique of the present invention is characterized in that: the bottom of Zinc-chromium composite coating is the zinc-chromium coating through modification, and surface layer is an organic coating;
(1), the material component of modified Zn chromiumcoating is:
A, zinc powder: sheet, its sheet thickness reaches 0.1 μ m, and sheet directly is a micron order, and usage quantity is 200-900g/L;
B, aluminium powder: sheet, its sheet thickness reaches 0.1 μ m, and sheet directly is a micron order, and usage quantity is 2-95g/L;
C, ethylene glycol: technical pure, usage quantity are 5-200g/L;
D, alkylphenol polyoxyethylene: usage quantity is 1-65g/L;
E, carboxymethyl cellulose: usage quantity is 0-50g/L;
F, tribasic maleic acid lead: usage quantity is 0-50g/L;
G, chromic acid: technical pure, usage quantity are 5-200g/L;
H, Trisodium Citrate: food grade, usage quantity are 2-300g/L;
I, Potassium Hydrogen Phthalate: technical pure, usage quantity are 2-300g/L;
J, polyoxyethylene glycol: technical pure, molecular weight are more than 6000, and usage quantity is 2-200g/L;
K, water are an amount of;
(2), the material component of organic coating:
A, HCPE: usage quantity is 5-500g/L;
B, chlorosulfonated polyethylene resin: usage quantity is 2-400g/L;
C, dioctyl phthalate (DOP): usage quantity is 5-400g/L;
D, 1-Methoxy-2-propyl acetate: usage quantity is 1-100g/L;
E, NBC usage quantity are 0-100g/L;
F, β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid stearyl alcohol ester: usage quantity is 0.5-200g/L;
G, VP SANDUVOR 3212: usage quantity is 0.2-1000mg/L;
H, tribasic maleic acid lead: usage quantity is 0.2-1000mg/L;
(3), the step of preparation Zinc-chromium composite coating is:
1., modified Zn chromiumcoating raw material is mixed with three kinds of components in advance respectively:
A component: zinc metal sheet, aluminium flake, ethylene glycol, alkylphenol polyoxyethylene, carboxymethyl cellulose, tribasic maleic acid lead;
B component: chromic acid, Trisodium Citrate, Potassium Hydrogen Phthalate;
The C component: polyoxyethylene glycol, all the other are water.
Modified Zn chromiumcoating preparation of raw material technology:
I, different according to purposes and environment for use determine to take by weighing the consumption of A, B, C three components;
II, employing water bath with thermostatic control are controlled at 25～30 ℃ with A, B component respectively;
III, fully stir the A component, and confirm to disperse fully, under the satisfactory prerequisite of temperature, slowly add the B component while stirring and, temperature is controlled at 32～40 ℃, its optimum temps is 35～38 ℃, and writes down the top temperature of mixing solutions;
IV, confirming not caking of A, B mixing solutions, disperseing completely to quicken to stir, and slowly to add the C component under the situation, continuing to stir and remove bubble, keeping temperature to surpass 30 ℃, preventing that C component caking back is difficult for dissolving;
V, continuously stirring keep going the blister attitude;
VI, defoam after, filter with 80～100 purpose stainless steel mesh screens;
VII, mensuration parameters can be used after meeting the requirements;
The spraying of modified Zn chromiumcoating, curing process:
Spraying: use through purification, exsiccant pressurized air; Water-content≤1.3g/m
3Oleaginousness≤0.1ppm, spray gun pressure is that 0.3～0.5MPa, angle [alpha] are that 45～90 °, coat-thickness are 20 ± 10 μ m; Start the spraying filtering system, guarantee that solution captures in the pond of rotating room;
The levelling of modified Zn chromiumcoating, curing process:
Levelling: the control flow time is greater than 10 minutes, less than 3 hours;
Baking-curing: workpiece enters the curing oven baking-curing behind levelling, operate by accompanying drawing 1 cure profile and to send electricity back furnace temperature to rise to 150 ℃, time is 30 minutes, stopped heat tracing 30 minutes, continue to be warming up to 350 ℃ afterwards, time is 40 minutes, is incubated after 10 minutes, and work-piece cools to 200 ℃ is come out of the stove.
2., be coated with organic coating and dry solidification at normal temperatures.
The invention solves the long-term corrosion problem of metallic surface under the atmospheric environment medium, particularly at large-scale component, as: the difficult treatment and the quality problems of the surface anticorrosive of electric tower, all kinds of lamp stand, motorway protective rail plate, fluid-transporting tubing etc.Adopt Zinc-chromium composite coating of the present invention to reduce the cost that metal surface anticorrosive is handled widely, also make the metal surface anticorrosive performance improve 3～5 times, improved antiseptic property, have remarkable economic efficiency and huge social benefit.
Description of drawings
Fig. 1 is modified Zn chromiumcoating cure profile figure
Embodiment embodiment one
The former employing of electric tower in the coastal cities in Liaoning Province be that anti-corrosive treatment is done in pot galvanize, use after 3 years and to find to have occurred obvious corrosion.
Calendar year 2001, another 220KV line power shaft tower of this area adopted Zinc-chromium composite coating of the present invention to do rotproofing, and its implementing process parameter is: (20kg calculates by preparation modified Zn chromiumcoating materials)
A component: zinc metal sheet 3.5kg, aluminium flake 0.2kg, ethylene glycol 0.5kg, alkylphenol polyoxyethylene 0.1kg, carboxymethyl cellulose 0.2kg, the plumbous 0.1kg of tribasic maleic acid;
B component: chromic acid 0.5kg, Trisodium Citrate 0.01kg, Potassium Hydrogen Phthalate 0.02kg;
The C component: polyoxyethylene glycol 36g, all the other are water.
PH value: 4.8, proportion: 1.31, Cr
+ 6Content 23g/L, coated weight: 210mg/dm
2, solidification value: 310 ℃, set time: 23 minutes.
Organic coating thickness: 10 μ m, Air drying.The user is reflected respond well.
Embodiment two
Implement Zinc-chromium composite coating for the protective rail plate of certain motorway production in Liaoning Province and do rotproofing, its processing parameter is: (20kg calculates by preparation modified Zn chromiumcoating materials)
A component: zinc metal sheet 3.52kg, aluminium flake 0.21kg, ethylene glycol 0.51kg, alkylphenol polyoxyethylene 0.09kg, carboxymethyl cellulose 0.19kg, the plumbous 0.11kg of tribasic maleic acid;
B component: chromic acid 0.55kg, Trisodium Citrate 0.01kg, Potassium Hydrogen Phthalate 0.022kg;
The C component: polyoxyethylene glycol 85g, all the other are water.
PH value: 4.5, proportion: 1.30, Cr
+ 6Content 25g/L, coated weight: 232mg/dm
2, solidification value: 305 ℃, set time: 25 minutes.
Organic coating thickness: 10 μ m, ambient cure, drying.
Claims (2)
1, a kind of Zinc-chromium composite coating is characterized in that: the bottom of Zinc-chromium composite coating is the zinc-chromium coating through modification, and surface layer is an organic coating;
(1), the material component of modified Zn chromiumcoating is:
A, zinc powder: sheet, its sheet thickness reaches 0.1 μ m, and sheet directly is a micron order, and usage quantity is 200-900g/L;
B, aluminium powder: sheet, its sheet thickness reaches 0.1 μ m, and sheet directly is a micron order, and usage quantity is 2-95g/L;
C, ethylene glycol: technical pure, usage quantity are 5-200g/L;
D, alkylphenol polyoxyethylene: usage quantity is 1-65g/L;
E, carboxymethyl cellulose: usage quantity is 0-50g/L;
F, tribasic maleic acid lead: usage quantity is 0-50g/L;
G, chromic acid: technical pure, usage quantity are 5-200g/L;
H, Trisodium Citrate: food grade, usage quantity are 2-300g/L;
I, Potassium Hydrogen Phthalate: technical pure, usage quantity are 2-300g/L;
J, polyoxyethylene glycol: technical pure, molecular weight are more than 6000, and usage quantity is 2-200g/L;
K, water are an amount of;
(2), the material component of organic coating:
A, HCPE: usage quantity is 5-500g/L;
B, chlorosulfonated polyethylene resin: usage quantity is 2-400g/L;
C, dioctyl phthalate (DOP): usage quantity is 5-400g/L;
D, 1-Methoxy-2-propyl acetate: usage quantity is 1-100g/L;
E, NBC usage quantity are 0-100g/L;
F, β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid stearyl alcohol ester: usage quantity is 0.5-200g/L;
G, VP SANDUVOR 3212: usage quantity is 0.2-1000mg/L;
H, tribasic maleic acid lead: usage quantity is 0.2-1000mg/L.
The preparation method of 2 Zinc-chromium composite coatings according to claim 1 is characterized in that: the step of preparation Zinc-chromium composite coating is:
Modified Zn chromiumcoating raw material is mixed with three kinds of components in advance respectively:
A component: zinc metal sheet, aluminium flake, ethylene glycol, alkylphenol polyoxyethylene, carboxymethyl cellulose, tribasic maleic acid lead;
B component: chromic acid, Trisodium Citrate, Potassium Hydrogen Phthalate;
The C component: polyoxyethylene glycol, all the other are water;
Modified Zn chromiumcoating preparation of raw material technology:
I, different according to purposes and environment for use determine to take by weighing the consumption of A, B, C three components;
II, employing water bath with thermostatic control are controlled at 25～30 ℃ with A, B component respectively;
III, fully stir the A component, and confirm to disperse fully, under the satisfactory prerequisite of temperature, slowly add the B component while stirring and, temperature is controlled at 32～40 ℃, and writes down the top temperature of mixing solutions;
IV, confirming not caking of A, B mixing solutions, disperseing completely to quicken to stir, and slowly to add the C component under the situation, continuing to stir and remove bubble, keeping temperature to surpass 30 ℃, preventing that C component caking back is difficult for dissolving;
V, continuously stirring keep going the blister attitude;
VI, defoam after, filter with 80～100 purpose stainless steel mesh screens;
VII, mensuration parameters can be used after meeting the requirements;
The spraying of modified Zn chromiumcoating, curing process:
Spraying: use through purification, exsiccant pressurized air; Water-content≤1.3g/m
3Oleaginousness≤0.1ppm, spray gun pressure is that 0.3～0.5MPa, angle [alpha] are that 45～90 °, coat-thickness are 20 ± 10 μ m; Start the spraying filtering system, guarantee that solution captures in the pond of rotating room;
The levelling of modified Zn chromiumcoating, curing process:
Levelling: the control flow time is greater than 10 minutes, less than 3 hours;
Baking-curing: workpiece enters the curing oven baking-curing behind levelling, send electricity back furnace temperature to rise to 150 ℃, and the time is 30 minutes, stopped heat tracing 30 minutes, and continued to be warming up to 350 ℃ afterwards, the time is 40 minutes, be incubated after 10 minutes, work-piece cools to 200 ℃ is come out of the stove;
Be coated with organic coating and dry solidification at normal temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109307 CN1204208C (en) | 2002-03-21 | 2002-03-21 | Zinc-chromium composite coating corrosion-proofing technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109307 CN1204208C (en) | 2002-03-21 | 2002-03-21 | Zinc-chromium composite coating corrosion-proofing technique |
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| CN1401708A CN1401708A (en) | 2003-03-12 |
| CN1204208C true CN1204208C (en) | 2005-06-01 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4313750B2 (en) * | 2004-11-04 | 2009-08-12 | 新日本製鐵株式会社 | Steel columns with corrosion protection at the buried underground |
| CN100460562C (en) * | 2006-12-01 | 2009-02-11 | 鞍山万事达电力有限公司 | Anti-corrosion technology for type-II Zn-Cr composite coating |
| CN102181191B (en) * | 2011-04-07 | 2013-08-28 | 安徽海程涂复科技有限公司 | Alloy antiseptic composite coating for coal mine underground gas pipe |
| CN102722010A (en) * | 2012-04-28 | 2012-10-10 | 成都鑫三洋科技发展有限公司 | Box body structure of optical cable transfer box |
| CN102850831A (en) * | 2012-08-27 | 2013-01-02 | 江西省电力科学研究院 | Novel anticorrosive coating for grid fitting |
| CN105672172B (en) * | 2016-01-06 | 2017-09-22 | 潍坊远大金属表面科技有限公司 | A kind of construction method of Dacroment steel highway barrier |
| CN107893230A (en) * | 2017-11-30 | 2018-04-10 | 大连智讯科技有限公司 | A kind of effective anti-corrosion material of ship seawater |
| CN108826240B (en) * | 2018-04-27 | 2020-09-15 | 宁波摩尔克斯灯杆技术有限公司 | Anti-oxidation stainless steel light projection lamp pole and preparation method thereof |
| CN108826241B (en) * | 2018-04-27 | 2020-09-15 | 宁波摩尔克斯灯杆技术有限公司 | Wear-resistant stainless steel light projection lamp pole and preparation method thereof |
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Granted publication date: 20050601 |