CN106733516B - Preparation method of high-temperature-resistant and corrosion-resistant coating - Google Patents
Preparation method of high-temperature-resistant and corrosion-resistant coating Download PDFInfo
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- CN106733516B CN106733516B CN201611263793.1A CN201611263793A CN106733516B CN 106733516 B CN106733516 B CN 106733516B CN 201611263793 A CN201611263793 A CN 201611263793A CN 106733516 B CN106733516 B CN 106733516B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0209—Multistage baking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- Application Of Or Painting With Fluid Materials (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to a preparation method of a high-temperature-resistant anti-corrosion coating, which comprises the following steps: the method comprises the following steps: carrying out sand blasting treatment on the steel part, and blowing floating dust; step two: uniformly spraying the HD345 coating on the surface of a part, drying the surface of the part, placing the part in an oven, and curing the part for 20-40 min at the temperature of 500-550 ℃; step three: testing the surface resistivity of the part treated in the second step at a fixed distance of 25mm on the surface, wherein the part is qualified when the surface resistivity is lower than 15 ohms; step four: measuring the coating thickness of the qualified part in the third step, and repeating the process if the coating thickness does not meet the use requirement; step five: finally, the standard-reaching component is placed in an oven and is cured for 20min to 40min at the temperature of 340 ℃ to 360 ℃. The technical scheme adopts HD345 paint design and development, the prepared coating can be used for a long time at the high temperature of 500 ℃, and the salt spray resistance is more than 500 h.
Description
Technical Field
The invention relates to a preparation method of a high-temperature-resistant anti-corrosion coating, belonging to the technical field of metal surface treatment.
Background
The high-power engine heat dissipation and smoke exhaust system is an important part of an armored vehicle, is usually made of steel, has the highest temperature of 500 ℃ when in work, and not only bears thermal corrosion but also deals with the damage of environmental corrosion to the high-power engine heat dissipation and smoke exhaust system in the use process of the vehicle, and particularly under the marine environment condition, the high-temperature, high-humidity and high-salt mist environment seriously corrodes and damages the part, and the use of the engine is directly influenced. The common anticorrosive paint can not be used for a long time at the high temperature of 500 ℃, so a coating which can resist the high temperature of 500 ℃ and has high corrosion resistance needs to be prepared on the part so as to protect the normal and reliable work of a heat dissipation and smoke exhaust system.
The most well known aluminum-containing high temperature resistant anticorrosive coating is SERMETEL-W, a proprietary product of TELEFLEX, USA, which was first introduced in 1961 when it was used for long-term protection of aeroengine blades (different grades of blades made of different metallic materials). Through years of development, more than 600 series of coating products are formed and are widely used for protecting metal materials in a high-humidity environment with a long-term working temperature of 600-700 ℃. Similar coatings in China have a large gap with foreign levels.
HD345 is a high-temperature coating produced in China, and the coating takes water-soluble phosphate as a main film forming substance, chromic acid (salt, anhydride and the like) as a regulator and carbonyl nickel powder as an additive to synthesize the water-based aluminum/ceramic high-temperature-resistant anti-corrosion composite coating.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for preparing a high temperature resistant and corrosion resistant coating designed and developed by using an HD345 paint, wherein the coating can be used at a high temperature of 500 ℃ for a long time, and the salt spray resistance is more than 500 h.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preparation method of a high-temperature-resistant anti-corrosion coating comprises the following steps:
the method comprises the following steps: carrying out sand blasting treatment on the steel part, and blowing floating dust;
step two: uniformly spraying the HD345 coating on the surface of a part, drying the surface of the part, placing the part in an oven, and curing the part for 20-40 min at the temperature of 500-550 ℃;
step three: testing the surface resistivity of the part treated in the second step at a fixed distance of 25mm on the surface, wherein the part is qualified when the surface resistivity is lower than 15 ohms;
step four: measuring the coating thickness of the qualified part in the third step, and repeating the process if the coating thickness does not meet the use requirement;
step five: finally, the standard-reaching component is placed in an oven and is cured for 20min to 40min at the temperature of 340 ℃ to 360 ℃.
Preferably, in the second step, the HD345 paint is uniformly sprayed on the surface of the component, dried, and then placed in an oven to be cured for 30min at 535 ℃.
Preferably, in the fifth step, the standard-reaching component is finally placed in an oven and cured for 30min at 350 ℃.
Preferably, in the fourth step, the thickness of the coating of the qualified part in the third step is measured by using a coating thickness measuring instrument.
Compared with the prior art, the invention has the following beneficial effects: the coating prepared by the technical scheme can be used for a long time at the high temperature of 500 ℃, has the salt spray resistance of more than 500h, can ensure the components of a heat-dissipation and smoke-exhaust system of a high-power engine, can be reliably used for a long time in severe environments such as oceans and the like, and can be used for batch production. According to the actual operating condition requirement, the experimental data for detecting the coating are recorded as follows:
Detailed Description
The invention will be further described with reference to specific embodiments:
a preparation method of a high-temperature-resistant anti-corrosion coating comprises the following steps:
the method comprises the following steps: carrying out sand blasting treatment on the steel part, and blowing floating dust;
step two: uniformly spraying the HD345 coating on the surface of a part, drying the surface of the part, placing the part in an oven, and curing the part for 20-40 min at the temperature of 500-550 ℃;
step three: testing the surface resistivity of the part treated in the second step at a fixed distance of 25mm on the surface, wherein the part is qualified when the surface resistivity is lower than 15 ohms;
step four: measuring the coating thickness of the qualified part in the third step, and repeating the process if the coating thickness does not meet the use requirement;
step five: finally, the standard-reaching component is placed in an oven and is cured for 20min to 40min at the temperature of 340 ℃ to 360 ℃.
And in the second step, the HD345 coating is uniformly sprayed on the surface of the part, dried, placed in an oven and cured for 30min at 535 ℃.
And finally, placing the standard-reaching part in an oven in the fifth step, and curing for 30min at 350 ℃.
Preferably, in the fourth step, the thickness of the coating of the qualified part in the third step is measured by using a coating thickness measuring instrument.
The coating prepared by the technical scheme can be used for a long time at the high temperature of 500 ℃, has the salt spray resistance of more than 500h, can ensure the components of a heat-dissipation and smoke-exhaust system of a high-power engine, can be reliably used for a long time in severe environments such as oceans and the like, and can be used for batch production. According to the actual operating condition requirement, the experimental data for detecting the coating are recorded as follows:
various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (4)
1. A preparation method of a high-temperature-resistant anti-corrosion coating comprises the following steps:
the method comprises the following steps: carrying out sand blasting treatment on the steel part, and blowing floating dust;
step two: uniformly spraying the HD345 coating on the surface of a part, drying the surface of the part, placing the part in an oven, and curing the part for 20-40 min at the temperature of 500-550 ℃;
step three: testing the surface resistivity of the part treated in the second step at a fixed distance of 25mm on the surface, wherein the part is qualified when the surface resistivity is lower than 15 ohm;
step four: measuring the coating thickness of the qualified part in the third step, and repeating the process if the coating thickness does not meet the use requirement;
step five: finally, placing the standard-reaching component in an oven, and curing for 20-40 min at the temperature of 340-360 ℃;
wherein, the main film forming material of the HD345 coating is water-soluble phosphate, the regulator is one of chromic acid, chromate and chromic anhydride, and the additive is carbonyl nickel powder.
2. The method for preparing the high-temperature-resistant anti-corrosion coating according to claim 1, wherein the method comprises the following steps: and in the second step, the HD345 coating is uniformly sprayed on the surface of the part, dried, placed in an oven and cured for 30min at 535 ℃.
3. The method for preparing a high temperature resistant anticorrosion coating according to claim 1 or 2, wherein: and fifthly, finally, placing the standard-reaching part in an oven, and curing for 30min at 350 ℃.
4. The method for preparing the high-temperature-resistant anti-corrosion coating according to claim 1, wherein the method comprises the following steps: and in the fourth step, measuring the coating thickness of the qualified part in the third step by using a coating thickness measuring instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611263793.1A CN106733516B (en) | 2016-12-30 | 2016-12-30 | Preparation method of high-temperature-resistant and corrosion-resistant coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611263793.1A CN106733516B (en) | 2016-12-30 | 2016-12-30 | Preparation method of high-temperature-resistant and corrosion-resistant coating |
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| CN106733516A CN106733516A (en) | 2017-05-31 |
| CN106733516B true CN106733516B (en) | 2021-01-29 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102558924A (en) * | 2010-12-09 | 2012-07-11 | 中国科学院金属研究所 | Preparation methods of high temperature resistant anticorrosion potassium silicate coating and corresponding coat |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3248251A (en) * | 1963-06-28 | 1966-04-26 | Teleflex Inc | Inorganic coating and bonding composition |
| US4319924A (en) * | 1974-02-12 | 1982-03-16 | Coatings For Industry, Inc. | Low-temperature curing coating composition |
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- 2016-12-30 CN CN201611263793.1A patent/CN106733516B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102558924A (en) * | 2010-12-09 | 2012-07-11 | 中国科学院金属研究所 | Preparation methods of high temperature resistant anticorrosion potassium silicate coating and corresponding coat |
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