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CN-121972387-A - Processing method for antiseptic treatment of radiator

CN121972387ACN 121972387 ACN121972387 ACN 121972387ACN-121972387-A

Abstract

The invention belongs to the technical field of radiator processing, and particularly relates to a radiator anti-corrosion treatment processing method which comprises the steps of S1, polishing a radiator to be processed, removing surface oxide skin and burrs, sequentially carrying out acid washing, water washing and drying treatment to obtain a pretreated radiator, S2, carrying out etching treatment on the pretreated radiator by adopting a micro-nano etching agent, carrying out water washing and drying after etching to obtain an etched radiator, S3, uniformly applying silane coupling agent primer coating liquid on the inner surface and the outer surface of the etched radiator to form a coating, and carrying out flash drying and low-temperature pre-curing treatment to obtain a surface modified radiator, S4, spraying fluorocarbon anti-corrosion paint on the inner surface and the outer surface of the surface modified radiator by adopting an electrostatic spraying technology within 60min after the flash drying and low-temperature pre-curing treatment, S5, placing the sprayed surface modified radiator into baking equipment, carrying out coating curing, cooling to room temperature to complete anti-corrosion treatment, realizing double combination of physical occlusion and chemical bridging, and improving the adhesive force of the coating.

Inventors

  • XU LINHUI
  • ZHANG JIE
  • ZHU CHAO

Assignees

  • 四川奥菲尔科技有限公司

Dates

Publication Date
20260505
Application Date
20260319

Claims (8)

  1. 1. The processing method for the anti-corrosion treatment of the radiator is characterized by comprising the following steps of: S1, polishing a radiator to be processed, removing surface oxide skin and burrs, and sequentially carrying out acid washing, water washing and drying to obtain a pretreatment radiator; S2, carrying out etching treatment on the pretreated radiator by adopting a micro-nano etchant, and washing and drying after etching to obtain the etched radiator, wherein the micro-nano etchant comprises 3-5% of phosphoric acid, 0.5-1% of ammonium bifluoride, 1-2% of citric acid, 0.1-0.2% of sodium dodecyl benzene sulfonate and the balance of deionized water; S3, uniformly applying silane coupling agent primer to the inner and outer surfaces of the etched radiator to form a coating, and performing flash drying and low-temperature pre-curing treatment to obtain the surface modified radiator, wherein the silane coupling agent primer comprises 2-3% by mass of an aminosilane coupling agent, 20-30% by mass of ethanol, 67-77% by mass of deionized water and 0.5-1% by mass of glacial acetic acid; s4, spraying fluorocarbon anticorrosive paint on the inner and outer surfaces of the radiator with the modified surfaces by adopting an electrostatic spraying process within 60 minutes after the flash drying and low-temperature pre-curing treatment are finished, wherein the spraying thickness is 30-80 mu m; and S5, placing the sprayed surface modified radiator in baking equipment, solidifying the coating, and cooling to room temperature to finish the anti-corrosion processing.
  2. 2. The method for processing the radiator according to claim 1, wherein the method comprises the following steps: In the step S1, 120-200-mesh sand paper is adopted for polishing, so that the surface roughness Ra of the radiator is 1.6-3.2 mu m, 8-15% of dilute sulfuric acid solution is adopted for pickling, the pickling temperature is 40-60 ℃, the pickling time is 10-20 min, and 80-100 ℃ hot air drying is adopted for drying for 10-20 min.
  3. 3. The method for processing the radiator according to claim 1, wherein the method comprises the following steps: In the step S2, spraying treatment is adopted for micro-nano etching, the spraying pressure is 0.1-0.2 MPa, the spraying time is 5-8 min, the etched water is high-pressure spraying water with the pressure of 0.2-0.3 MPa, the water washing time is 3-5 min, the drying is carried out by adopting 70-80 ℃ hot air, the drying time is 10-15 min, and the silane coupling agent primer coating is completed within 30min after micro-nano etching.
  4. 4. A radiator anti-corrosion treatment processing method according to claim 3, characterized in that: in the step S3, the pH value of the primer coating liquid of the silane coupling agent is 3-4, and the application mode is low-pressure airless spraying.
  5. 5. The method for processing the radiator according to claim 1, wherein the method comprises the following steps: In the step S3, the flash drying is normal-temperature flash drying, the low-temperature pre-curing temperature is 60-70 ℃, and the pre-curing time is 10-15 min.
  6. 6. The method for processing the radiator according to claim 1, wherein the method comprises the following steps: In the step S4, the fluorocarbon anti-corrosion paint comprises 35-40 parts by weight of fluorocarbon resin, 2-5 parts by weight of nano silicon dioxide, 2-3 parts by weight of defoamer, 1-2 parts by weight of dispersant, 2-3 parts by weight of plasticizer, 1-2 parts by weight of hydrophobing agent and 1-2 parts by weight of deionized water, wherein the electrostatic spraying voltage is 60-80 kV, and the paint outlet amount of a spray gun is 100-200 mL/min.
  7. 7. The method for processing the radiator according to claim 1, wherein the method comprises the following steps: in the step S5, the coating is required to be preheated for 10-20 min at 60-80 ℃, then heated to 180-220 ℃ at a heating rate of 5-10 ℃ per min, and cured at a constant temperature for 30-60 min.
  8. 8. The method for processing the radiator according to claim 1, wherein the method comprises the following steps: The radiator is a steel column type, copper-aluminum composite or plate type radiator.

Description

Processing method for antiseptic treatment of radiator Technical Field The invention belongs to the technical field of radiator processing, in particular to a radiator anti-corrosion treatment processing method, and particularly relates to a radiator surface anti-corrosion treatment process based on micro-nano etching and silane coupling agent primer coating compound modification, which is suitable for anti-corrosion treatment of inner and outer surfaces of various radiators such as steel, copper-aluminum compound, plate type and the like. Background The radiator is used as core equipment of a northern heating system, the radiator is made of metal materials such as steel, copper-aluminum composite and the like, in the long-term use process, the inner cavity is continuously contacted with water and vapor, the outside is exposed to the air environment, the metal surface is easy to rust due to the temperature-humidity alternate working condition, the heat dissipation efficiency of the radiator is reduced, the service life of the radiator is shortened, and therefore, the anti-corrosion treatment is a key process for producing and processing the radiator. The existing radiator anti-corrosion treatment method is mainly to directly spray anti-corrosion paint after surface polishing, acid washing and phosphating and then bake and solidify. The technology has the obvious defects that the metal surface is only subjected to macroscopic rust removal after the traditional pretreatment, the anti-corrosion paint and the metal substrate are only subjected to physical adsorption, the binding force is weak, the coating adhesive force is 2-3 levels, the problems of peeling, falling, cracking and the like are easy to occur after long-term use, particularly, the inner cavity of the radiator is of a closed/semi-closed structure with narrow pipelines and multiple ribs, the traditional technology cannot realize the effective modification of the inner cavity surface, sagging and pinholes are easy to occur after the paint is sprayed, and the paint becomes a corroded core break. In view of the above, the invention provides a radiator preservative treatment processing method. Disclosure of Invention Aiming at the problems of insufficient coating adhesive force, dead zone in inner cavity treatment and high reconstruction cost of special equipment in the existing radiator anti-corrosion treatment process, the invention provides a radiator anti-corrosion treatment processing method, which adopts a composite modification process of micro-nano etching and silane coupling agent priming, improves the binding force of anti-corrosion paint and a metal substrate from physical occlusion and chemical bridging dual dimensions, realizes the synchronous modification of the inner surface and the outer surface of the radiator without dead zone, has simple process, universal equipment and low cost, can be in seamless connection with the existing production line, and remarkably improves the anti-corrosion performance and the service life of the radiator. In order to achieve the purpose, the invention adopts the following technical scheme that the processing method for the anti-corrosion treatment of the radiator comprises the following steps: S1, polishing a radiator to be processed, removing surface oxide skin and burrs, and sequentially carrying out acid washing, water washing and drying to obtain a pretreatment radiator; S2, carrying out etching treatment on the pretreated radiator by adopting a micro-nano etchant, and washing and drying after etching to obtain the etched radiator, wherein the micro-nano etchant comprises 3-5% of phosphoric acid, 0.5-1% of ammonium bifluoride, 1-2% of citric acid, 0.1-0.2% of sodium dodecyl benzene sulfonate and the balance of deionized water; S3, uniformly applying silane coupling agent primer to the inner and outer surfaces of the etched radiator to form a coating, and performing flash drying and low-temperature pre-curing treatment to obtain the surface modified radiator, wherein the silane coupling agent primer comprises 2-3% by mass of an aminosilane coupling agent, 20-30% by mass of ethanol, 67-77% by mass of deionized water and 0.5-1% by mass of glacial acetic acid; s4, spraying fluorocarbon anticorrosive paint on the inner and outer surfaces of the radiator with the modified surfaces by adopting an electrostatic spraying process within 60 minutes after the flash drying and low-temperature pre-curing treatment are finished, wherein the spraying thickness is 30-80 mu m; and S5, placing the sprayed surface modified radiator in baking equipment, solidifying the coating, and cooling to room temperature to finish the anti-corrosion processing. In the step S1, 120-200-mesh sand paper is adopted for polishing, so that the surface roughness Ra of the radiator is 1.6-3.2 mu m, 8-15% of dilute sulfuric acid solution is adopted for pickling, the pickling temperature is 40-60 ℃, the pickling time is 10-20 min, and 80-100