CN114367427A - Surface treatment process for automobile parts - Google Patents
Surface treatment process for automobile parts Download PDFInfo
- Publication number
- CN114367427A CN114367427A CN202011093369.3A CN202011093369A CN114367427A CN 114367427 A CN114367427 A CN 114367427A CN 202011093369 A CN202011093369 A CN 202011093369A CN 114367427 A CN114367427 A CN 114367427A
- Authority
- CN
- China
- Prior art keywords
- spraying
- surface treatment
- automobile
- treatment process
- automobile parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004381 surface treatment Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005507 spraying Methods 0.000 claims abstract description 56
- 238000005498 polishing Methods 0.000 claims abstract description 32
- 239000007888 film coating Substances 0.000 claims abstract description 19
- 238000009501 film coating Methods 0.000 claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 53
- 238000000576 coating method Methods 0.000 claims description 33
- 239000011248 coating agent Substances 0.000 claims description 28
- 239000007921 spray Substances 0.000 claims description 26
- 239000005543 nano-size silicon particle Substances 0.000 claims description 24
- 235000012239 silicon dioxide Nutrition 0.000 claims description 24
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 23
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims description 12
- 229910017604 nitric acid Inorganic materials 0.000 claims description 12
- 239000010881 fly ash Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 7
- 244000137852 Petrea volubilis Species 0.000 claims description 6
- 229960000583 acetic acid Drugs 0.000 claims description 6
- 239000012362 glacial acetic acid Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 10
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 238000007747 plating Methods 0.000 abstract description 5
- 238000005240 physical vapour deposition Methods 0.000 description 17
- 238000009832 plasma treatment Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
Classifications
-
- 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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- 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
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
-
- 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
- B05D3/10—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 other chemical means
- B05D3/102—Pretreatment of metallic substrates
-
- 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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a surface treatment process for automobile parts, which comprises the following steps: 1) polishing; 2) spraying; 3) plasma surface treatment; 4) primary film coating; 5) secondary film coating; 6) spraying glaze; 7) and (5) plating a film for three times. Through the steps, the metal content of the automobile parts made of metal plates mostly such as automobile seats, automobile bodies and the like is supplemented, the compression resistance and the wear resistance are good, and the application prospect is good.
Description
Technical Field
The invention belongs to the technical field of automobile part production, and particularly relates to an automobile part surface treatment process.
Background
Automobile parts are parts and accessories constituting an automobile, such as an engine part, a brake system part, a steering system part, a running system part, an electric appliance system part, an automobile lamp, an automobile seat, a body, and the like. Most of these fittings are sheet metal, which is subject to corrosion problems. Corrosion not only damages the appearance of the automobile, but also directly affects the service life of the automobile, and simultaneously causes environmental pollution, accidents and waste of materials and energy. Therefore, the automobile parts need to be subjected to metal surface treatment when leaving factories, and the common surface treatment modes of automobiles are as follows: electrochemical treatment (electroplating and anodization); coating (spraying, electrophoresis); chemical treatment (phosphating, passivation, blackening); heat treatment (hot dip coating, thermal spraying, hot stamping, chemical heat treatment, etc.); vacuum methods (evaporation plating, sputtering plating, ion plating, etc.). Each treatment method has advantages and disadvantages, and the application needs to be comprehensively considered, such as material cost, production procedures, processing time, treatment effect, environmental pollution and the like.
CN 106000818A discloses a surface treatment process for automobile parts, which comprises seven steps of spraying degreasing, chemical polishing, plasma surface treatment, glaze layer spraying, baking and curing, secondary cleaning and PVD film coating. It is also common in the art to clean the surface of the automobile parts and then spray the glaze. However, the cleaning and polishing also means damage to the original automobile parts surface, so that the original metal content of the surface is reduced, and the compression and abrasion resistance is reduced. Therefore, the surface treatment process for the automobile parts, which supplements the metal content and keeps good compression resistance and wear resistance, is lacked at present. The above problems need to be solved.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the surface treatment process for the automobile parts, which can supplement metal content and keep good compression resistance and wear resistance.
The technical solution of the invention is as follows: a surface treatment process for automobile parts comprises the following steps:
1) polishing: firstly, grinding by using sand paper, then adding a chemical polishing reagent for chemical polishing, washing and drying;
2) spraying: spraying the surface of the polished automobile part with a spraying liquid for 1-2 min at the temperature of 40-50 ℃, repeatedly spraying after 2-3 min, spraying for 1-3 times in total, and then washing with water; the solvent of the spray liquid is prepared from (10-15) by volume: 1, water and ethanol, wherein the solute of the spray liquid is sulfuric acid, and the concentration of the sulfuric acid is 3-5 mol/L;
3) plasma surface treatment: the method comprises the steps that a spray gun of vacuum plasma processing equipment moves at a constant speed relative to an automobile part at a position 10-15 mm away from the surface of the automobile part to spray oxygen plasma beams to the surface of the automobile part, and vacuum plasma processing is carried out on the surface of the automobile part, wherein the moving speed of the spray gun relative to the automobile part is 50-100 mm/s;
4) primary film coating: uniformly spraying nano alumina at the temperature of 100-150 ℃ to form a nano alumina film;
5) secondary film coating: uniformly spraying a mixture of nano silicon dioxide and fly ash with the mass ratio of 1 to (0.1-0.3) at the temperature of 50-80 ℃ and the humidity of 10-20% to form a nano silicon dioxide film;
6) and (3) glaze spraying: atomizing and spraying glaze on the surface of the automobile part subjected to secondary coating, drying at 120-150 ℃, and washing with water to form a glaze layer;
7) and (3) coating for three times: and carrying out PVD (physical vapor deposition) film coating on the surface of the automobile part sprayed with the glaze, thus finishing the surface treatment of the automobile part.
Preferably, the thickness of the PVD coating film is the thickness of the nano-alumina film minus the thickness of the nano-silica film. The thickness of each formed layer is proper, and the layers are not interfered or infiltrated and mixed with each other, namely, the surface of the accessory with high hardness is completely protected, the glaze layer can also be uniformly and clearly displayed, and the outermost layer further protects the surface of the automobile accessory.
Preferably, the thickness of the nano alumina film is 1.5-3 μm; the thickness of the nano silicon dioxide film is 0.01-0.05 mu m.
Preferably, the thickness of the glaze layer is 10-30 μm.
Preferably, the chemical polishing reagent is a mixed solution of nitric acid and glacial acetic acid with the mass ratio of 1: (0.5-1). The roughness after polishing can reach 0.03 mu m. The chemical polishing agent has small concentration of the used reagent, and can achieve the same effects of degreasing and polishing as the prior art.
Preferably, the concentration of the nitric acid is 1-2 mol/L. The chemical polishing reagent has low nitric acid concentration, is mild during polishing, and cannot damage the surface or even the inside of local automobile parts due to local high-pressure spraying.
Preferably, the granularity of the sand paper in the step 1) is 200-800 meshes.
Preferably, the spraying pressure in the step 2) is 0.2-0.4 MPa.
Preferably, the particle size of the nano alumina is 0.1-100 nm.
Preferably, the particle size of the nano silicon dioxide is 0.1-50 nm.
The invention has the following beneficial effects: 1) the invention has many innovations in the sequence of the treatment process: firstly, physical polishing of staggered sanding by abrasive paper is firstly carried out, and then chemical polishing is carried out, so that the method is quick and efficient, and materials and cost are saved; secondly, polishing is carried out firstly, then leaching is carried out, the conventional treatment sequence is changed, and the surface metal loss is reduced; thirdly, firstly, spraying and polishing, and then carrying out plasma surface treatment, so that the performance of the accessory is enhanced after the surface of the accessory is cleaned;
2) the plasma surface treatment process is used for surface treatment of automobile parts, so that the decontamination effect is enhanced, and the adhesion force of later-stage coating is obviously improved;
3) the nano alumina sprayed by one-time film coating can supplement the metal content and keep good compression resistance and wear resistance;
4) the secondary coating limits the temperature and the humidity, the plasma surface treatment effect can be well kept, and the sprayed nano silicon dioxide film is uniformly distributed and completely covers the surface of the automobile part under the condition;
5) the fly ash is added into the nano silicon dioxide film in the secondary coating, the frosted feeling of the surface is increased, the cohesiveness is increased, the subsequent glaze spraying is convenient, the glaze can be quickly and firmly adsorbed on the nano silicon dioxide film, and meanwhile, the fly ash is in a flowable state under the conditions of the primary coating and the glaze spraying, namely the fly ash can be diffused to the surface of the glaze layer, so that the PVD coating can be adhered to the glaze layer for a long time;
6) the thicknesses of the three coatings follow a certain relation, and no interference or permeation mixing exists between the three coatings, so that the surface of the accessory with high hardness is completely protected, and the glaze layer can be uniformly and clearly displayed;
7) the surface of the automobile parts treated by the process has high hardness, corrosion resistance, oxidation resistance, wear resistance and long service life.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples.
Sulfuric acid, ethanol, nano-alumina, nano-silica nitric acid, glacial acetic acid and glaze, wherein the raw materials or reagents are purchased from the market. Fly ash is a waste product from the combustion of collected coal.
The following examples are not provided to limit the scope of the present invention, nor are the steps described to limit the order of execution. Modifications of the invention which are obvious to those skilled in the art in view of the prior art are also within the scope of the invention as claimed.
Example one
A surface treatment process for automobile parts comprises the following steps: 1) polishing: grinding the automobile parts to be treated by sand paper with the granularity of 200 meshes, then adding a chemical polishing reagent for chemical polishing, washing and drying; the chemical polishing reagent is a mixed solution of nitric acid and glacial acetic acid with the mass ratio of 1: 0.5, and the concentration of the nitric acid is 1 mol/L;
2) spraying: spraying the polished surface of the automobile part with a spray liquid for 2min at the temperature of 40 ℃, repeatedly spraying for 3 times at intervals of 2min, and then washing with water; the solvent of the spray liquid is prepared from the following components in a volume ratio of 15: 1, water and ethanol, wherein the solute of the spray liquid is sulfuric acid, and the concentration of the sulfuric acid is 3 mol/L; the spraying pressure is 0.2 MPa;
3) plasma surface treatment: spraying oxygen plasma beams to the surface of the automobile part by using a spray gun of vacuum plasma treatment equipment to move at a constant speed relative to the automobile part at a position 10mm away from the surface of the automobile part, and carrying out vacuum plasma treatment on the surface of the automobile part, wherein the moving speed of the spray gun relative to the automobile part is 100 mm/s;
4) primary film coating: uniformly spraying 0.1nm of nano alumina at the temperature of 100 ℃ to form a nano alumina film;
5) secondary film coating: uniformly spraying a mixture consisting of nano silicon dioxide and fly ash with the mass ratio of 1: 0.1 at the temperature of 50 ℃ and the humidity of 20% to form a nano silicon dioxide film; the particle size of the nano silicon dioxide is 0.1 nm;
6) and (3) glaze spraying: atomizing and spraying glaze on the surface of the automobile part subjected to secondary coating, drying at 120 ℃, and washing with water to form a glaze layer;
7) and (3) coating for three times: and carrying out PVD (physical vapor deposition) film coating on the surface of the automobile part sprayed with the glaze, thus finishing the surface treatment of the automobile part.
The thickness of the nano alumina film is 1.5 mu m; the thickness of the nano silicon dioxide film is 0.01 mu m; the thickness of the glaze layer is 10 mu m; the thickness of the PVD coating is 1.49 mu m.
Example two
A surface treatment process for automobile parts comprises the following steps: 1) polishing: grinding the automobile parts to be treated by sand paper with the granularity of 500 meshes, then adding a chemical polishing reagent for chemical polishing, washing and drying; the chemical polishing reagent is a mixed solution of nitric acid and glacial acetic acid with the mass ratio of 1: 0.8, and the concentration of the nitric acid is 1.5 mol/L;
2) spraying: spraying the polished surface of the automobile part with a spray liquid for 1.5min at the temperature of 45 ℃, repeatedly spraying for 2 times after 3min, and then washing with water; the solvent of the spray liquid is prepared from the following components in a volume ratio of 12: 1, water and ethanol, wherein the solute of the spray liquid is sulfuric acid, and the concentration of the sulfuric acid is 4 mol/L; the spraying pressure is 0.3 MPa;
3) plasma surface treatment: spraying oxygen plasma beams to the surface of the automobile part by using a spray gun of vacuum plasma treatment equipment to move at a constant speed relative to the automobile part at a position 12mm away from the surface of the automobile part, and carrying out vacuum plasma treatment on the surface of the automobile part, wherein the moving speed of the spray gun relative to the automobile part is 80 mm/s;
4) primary film coating: uniformly spraying 50nm nano-alumina at the temperature of 120 ℃ to form a nano-alumina film;
5) secondary film coating: uniformly spraying a mixture consisting of nano silicon dioxide and fly ash with the mass ratio of 1: 0.2 at the temperature of 70 ℃ and the humidity of 15% to form a nano silicon dioxide film; the particle size of the nano silicon dioxide is 30 nm;
6) and (3) glaze spraying: atomizing glaze, spraying the glaze on the surface of the automobile part subjected to secondary coating, drying at 130 ℃, and washing to form a glaze layer;
7) and (3) coating for three times: and carrying out PVD (physical vapor deposition) film coating on the surface of the automobile part sprayed with the glaze, thus finishing the surface treatment of the automobile part.
The thickness of the nano alumina film is 2 μm; the thickness of the nano silicon dioxide film is 0.03 mu m; the thickness of the glaze layer is 20 mu m; the thickness of the PVD coating film is 1.97 mu m.
EXAMPLE III
A surface treatment process for automobile parts comprises the following steps: 1) polishing: grinding the automobile parts to be treated by using abrasive paper with the granularity of 800 meshes, then adding a chemical polishing reagent for chemical polishing, washing and drying; the chemical polishing reagent is a mixed solution of nitric acid and glacial acetic acid with the mass ratio of 1: 1, and the concentration of the nitric acid is 2 mol/L;
2) spraying: spraying the polished surface of the automobile part with a spray liquid for 2min at the temperature of 50 ℃, repeatedly spraying for 3 times at intervals, and then washing with water; the solvent of the spray liquid is prepared from the following components in a volume ratio of 15: 1, water and ethanol, wherein the solute of the spray liquid is sulfuric acid, and the concentration of the sulfuric acid is 5 mol/L; the spraying pressure is 0.4 MPa;
3) plasma surface treatment: spraying oxygen plasma beams to the surface of the automobile part by using a spray gun of vacuum plasma treatment equipment to move at a constant speed relative to the automobile part at a position 15mm away from the surface of the automobile part, and carrying out vacuum plasma treatment on the surface of the automobile part, wherein the moving speed of the spray gun relative to the automobile part is 100 mm/s;
4) primary film coating: uniformly spraying 100nm nano-alumina at the temperature of 150 ℃ to form a nano-alumina film;
5) secondary film coating: uniformly spraying a mixture consisting of nano silicon dioxide and fly ash with the mass ratio of 1: 0.3 at the temperature of 80 ℃ and the humidity of 20% to form a nano silicon dioxide film; the particle size of the nano silicon dioxide is 50 nm;
6) and (3) glaze spraying: atomizing and spraying glaze on the surface of the automobile part subjected to secondary coating, drying at 150 ℃, and washing with water to form a glaze layer;
7) and (3) coating for three times: and carrying out PVD (physical vapor deposition) film coating on the surface of the automobile part sprayed with the glaze, thus finishing the surface treatment of the automobile part.
The thickness of the nano alumina film is 3 μm; the thickness of the nano silicon dioxide film is 0.05 mu m; the thickness of the glaze layer is 30 mu m; the thickness of the PVD coating is 2.95 mu m.
Product testing
1. The automobile part obtained by the automobile part surface strengthening process has the tensile strength of 7-15 GPa, the elastic modulus of 130-150 GPa and the friction coefficient of 0.2-0.4 through tests. The comparative example is an automobile part without primary coating, the tensile strength is 7-14 GPa, the elastic modulus is 125-155 GPa, and the friction coefficient is 0.3-0.6. The metal content is supplemented, the wear resistance is increased, and the good compression resistance and wear resistance are kept after one-time film coating.
2. And (3) testing the adhesion: the three coatings of the invention are subjected to a peeling experiment, and the secondary coating without fly ash is taken as a comparative example, and other conditions are the same. Through tests, the peel strength of the three coatings of the invention is 14-19N/mm, and the peel strength of the three coatings of the comparative example is 6-8N/mm. The adhesion of the third plating film is obviously improved by adding the fly ash into the second plating film.
3. Thickness comparison test of the film layer: the thickness of the PVD coating film in the invention is the thickness of the nano alumina film minus the thickness of the nano silica film, and the comparison example has no relation. In comparative example 1, the thickness of the PVD coating is larger than that of the nano alumina film, and the glaze layer is fuzzy and unclear; in the comparative example 2, the thickness of the PVD coating is smaller than that of the nano silicon dioxide film, the surface strength is reduced, the tensile strength is 6-12 GPa, the elastic modulus is 110-135 GPa, and the friction coefficient is 0.5-0.6. The coating film of the invention meets the relationship, not only completely protects the surface of the accessory with high hardness, but also can uniformly and clearly display the glaze layer.
The above description is only a preferred embodiment of the present invention, and it should not be understood that the scope of the present invention is limited thereby, and it should be understood by those skilled in the art that various other modifications and equivalent arrangements can be made by applying the technical solutions and concepts of the present invention within the scope of the present invention as defined in the appended claims.
Claims (10)
1. The surface treatment process of the automobile parts is characterized by comprising the following steps of: 1) Polishing: firstly, grinding by using sand paper, then adding a chemical polishing reagent for chemical polishing, washing and drying; 2) Spraying: spraying the surface of the polished automobile part with a spraying liquid for 1-2 min at the temperature of 40-50 ℃, repeatedly spraying after 2-3 min, spraying for 1-3 times in total, and then washing with water; the solvent of the spray liquid is prepared from (10-15) by volume: 1, water and ethanol, wherein the solute of the spray liquid is sulfuric acid, and the concentration of the sulfuric acid is 3-5 mol/L; 3) Plasma surface treatment: the method comprises the steps that a spray gun of vacuum plasma processing equipment moves at a constant speed relative to an automobile part at a position 10-15 mm away from the surface of the automobile part to spray oxygen plasma beams to the surface of the automobile part, and vacuum plasma processing is carried out on the surface of the automobile part, wherein the moving speed of the spray gun relative to the automobile part is 50-100 mm/s; 4) Primary film coating: uniformly spraying nano alumina at the temperature of 100-150 ℃ to form a nano alumina film; 5) Secondary film coating: uniformly spraying a mixture of nano silicon dioxide and fly ash with the mass ratio of 1 to (0.1-0.3) at the temperature of 50-80 ℃ and the humidity of 10-20% to form a nano silicon dioxide film; 6) And (3) glaze spraying: atomizing and spraying glaze on the surface of the automobile part subjected to secondary coating, drying at 120-150 ℃, and washing with water to form a glaze layer; 7) And (3) coating for three times: and carrying out PVD coating on the surface of the automobile part sprayed with the glaze, namely finishing the surface treatment of the automobile part.
2. The surface treatment process for automobile parts according to claim 1, wherein the thickness of the PVD coating is the thickness of the nano-alumina film minus the thickness of the nano-silica film.
3. The surface treatment process for automobile parts according to claim 1, wherein the thickness of the nano alumina film is 1.5 to 3 μm; the thickness of the nano silicon dioxide film is 0.01-0.05 mu m.
4. The surface treatment process for automobile parts according to claim 1, wherein the thickness of the glaze layer is 10 to 30 μm.
5. The surface treatment process for automobile parts as claimed in claim 1, wherein the chemical polishing agent is a mixed solution of nitric acid and glacial acetic acid in a mass ratio of 1: 0.5-1.
6. The surface treatment process for the automobile parts, according to claim 5, is characterized in that the concentration of the nitric acid is 1-2 mol/L.
7. The surface treatment process for the automobile parts according to claim 1, wherein the granularity of the sand paper in the step 1) is 200-800 meshes.
8. The surface treatment process for automobile parts according to claim 1, wherein the spraying pressure in the step 2) is 0.2-0.4 MPa.
9. The surface treatment process for the automobile parts, according to claim 1, characterized in that the particle size of the nano alumina is 0.1-100 nm.
10. The surface treatment process for automobile parts according to claim 1, wherein the nano silicon dioxide has a particle size of 0.1 to 50 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011093369.3A CN114367427A (en) | 2020-10-14 | 2020-10-14 | Surface treatment process for automobile parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011093369.3A CN114367427A (en) | 2020-10-14 | 2020-10-14 | Surface treatment process for automobile parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114367427A true CN114367427A (en) | 2022-04-19 |
Family
ID=81138650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011093369.3A Pending CN114367427A (en) | 2020-10-14 | 2020-10-14 | Surface treatment process for automobile parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114367427A (en) |
-
2020
- 2020-10-14 CN CN202011093369.3A patent/CN114367427A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101733240B (en) | New process for painting container of engineering dump truck | |
| JPH04228583A (en) | Steel commodity having double protective coating and its manufacture | |
| JPS61218841A (en) | Rotor for disc brake | |
| JP2005513258A (en) | Method for coating a metal surface | |
| CN111036518B (en) | Copper-imitating wire drawing board and its production process | |
| CN1986160A (en) | Magnesium alloy surface pre-treating process | |
| CN108716001B (en) | A kind of automobile parts process of surface treatment | |
| CN111850482A (en) | Vacuum plating PVD coating process | |
| JP4219326B2 (en) | Method for metallizing polymeric components for painting | |
| CN108554755B (en) | A kind of automobile parts surface intensified technique | |
| KR100613157B1 (en) | Mg OR Mg-ALLOY HOUSING AND METHOD FOR PRODUCING THE SAME | |
| CN109402708B (en) | Preparation method of aluminum and aluminum alloy wear-resistant self-lubricating coating | |
| CN114367427A (en) | Surface treatment process for automobile parts | |
| CN110815057A (en) | Treatment method of acid-free phosphatized metal plate | |
| WO2011070859A1 (en) | Method for heating steel sheet for hot pressing use | |
| CN108906553A (en) | The surface treatment method and aluminum alloy materials of aluminum alloy base material | |
| CN109486424A (en) | A kind of handware process of surface treatment | |
| CN111763944A (en) | Aluminum alloy wheel surface coating method | |
| TWI716170B (en) | Method for treating and phosphatizing metal board without acid | |
| CN104404441A (en) | Preparation method for copper-plated steel band | |
| CN114369789A (en) | Surface strengthening process for automobile parts | |
| KR101084039B1 (en) | Process for coating anti-corrosive coating agent of steel sheet | |
| JP3479753B2 (en) | Steel surface treatment method and aqueous chromate treatment liquid | |
| CN114453214B (en) | Commercial vehicle cab coating method | |
| JPH0681166A (en) | Surface treating method of steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220419 |
|
| WD01 | Invention patent application deemed withdrawn after publication |