CN103102803A - Aromatic hydrocarbon free antiseptic flow of metal structure - Google Patents

Abstract

The invention discloses an aromatic hydrocarbon free antiseptic flow of a metal structure. The flow comprises the following steps of: mixing the components such as siloxane, a solvent, silicon dioxide particles, a rare earth compound, deionized water, a catalyst, carbon fiber and polyimide, and curing the components; then filtering the cured mixture; spraying, brush coating or dipping on the surface of a base material; and forming a coating on the surface of the base material after deposition to realize surface antiseptic treatment.

Description

Aromatic-free corrosion protection process for metal structures

technical field

The invention relates to an aromatic-free anticorrosion process for a metal structure, in particular to a coating method for an environmentally friendly paint that is suitable for the surface of a metal structure, has excellent gloss and mechanical and physical properties, and does not contain aromatic hydrocarbon solvents. the

Background technique

In modern industry and daily life, metal corrosion can be seen everywhere, especially in the form of crevice corrosion, stress corrosion and corrosion fatigue in the storage containers of fuel oil and hazardous chemicals, which cause great safety hazards to people's lives.

The metal protection methods currently used can be roughly divided into three categories: one is anodic oxidation treatment, that is, an anodic oxidation film with a thickness of tens of microns is formed on the metal surface, but due to the large energy consumption of the anodic oxidation process and the contamination of the electrolyte solution Serious, difficult to handle, and its application is limited; the second type is chemical conversion coating, that is, soaking metal parts in a solution of a certain composition, and forming a layer of chemical conversion coating by chemical reaction at a certain temperature, which is now the most widely used It is the chemical oxidation of chromate, but chromate is a carcinogenic toxic substance. The World Environmental Protection Organization has proposed to restrict the use of chromate and other chromate-containing compounds; the third category is organic coatings, that is, on metal surfaces Applying an organic coating to improve the appearance and physicochemical properties of the metal. In recent years, people have begun to use rare earth elements in the anti-corrosion technology of metal surfaces.

Rare earth conversion film-forming technology has been developed to this day, and people have made a lot of improvements to various film-forming processes, and the performance of the film has also been improved. At present, the rare earth conversion coating technology is mainly immersion treatment, which is simple to operate and easy to maintain; but its disadvantages are that the long-term immersion process takes too long to form a thin film layer and poor adhesion to the substrate. After long-term exploration and research, it is found that adding strong oxidants to the soaking solution, such as H ₂ O ₂ , KMnO ₄ , (NH ₄ ) ₂ S ₂ O ₈ and other strong oxides, can greatly increase the film formation rate and greatly shorten the treatment time. At the same time, the temperature of the treatment solution is not high and can be applied at room temperature. However, the stability of the treatment process is poor due to the presence of strong oxidants.

In order to solve the problems existing in the rare earth conversion film treatment process, the invention proposes an improved anticorrosion paint coating method. This method has low anticorrosion cost and significant economic benefits, can be applied at normal temperature, has a simple coating process, and the solution is environmentally friendly and pollution-free. the

Contents of the invention

The purpose of the present invention is to address the deficiencies of the prior art, to provide an aromatic-free anticorrosion process for environmentally friendly metal structures, to solve the anticorrosion problems of steel, aluminum, especially aluminum alloys and other internal and external surface coatings, and the coating It does not contain aromatic solvents, strong oxidants, and toxic pigments. It is suitable for various construction methods. The coating is not limited by seasons. The construction process is simple and convenient, the technical cost is low, and the environmental protection performance is good. the

The present invention is achieved through the following technical solutions:

(1) Prepare the following components (parts by mass):

a vinyltriethoxysilane 1-10;

b propanol 40-60;

c SiO ₂ particles 1-5;

d Cerium oxide 6-10;

e deionized water 5-25;

f Acetic acid 4-6;

g carbon fiber 5-7;

h polyimide 1-3;

(2) Mix the above components and perform aging treatment, then spray, brush or dip on the surface of the substrate, and form a coating on the surface of the substrate after deposition to achieve surface anti-corrosion treatment.

Detailed ways

The invention relates to an aromatic-free anti-corrosion process for metal structures. After mixing various components of anti-corrosion coatings, aging treatment is carried out, and then the aged mixture is filtered, and then sprayed, brushed or dipped on the surface of the substrate, deposited on the A coating is formed on the surface of the substrate to achieve surface anti-corrosion treatment. the

The particle diameter of the SiO ₂ particles is 50-100 nanometers.

The aging treatment is standing at room temperature for 50-60 hours.

The base material is steel or aluminum, preferably aluminum alloy.

Heating is carried out during the deposition process after spraying, brushing or dipping, and the heating temperature is 50° C. to 150° C. for 1 minute to 1 hour. the

The thickness of the coating is 1 micron to 10 microns, preferably 1 micron to 5 microns. The coating is preferably formed on the surface of the substrate by spraying or brushing. the

The anti-corrosion paint coating method disclosed by the present invention is simple, convenient, fast and reliable to operate, and the raw material is cheap. In the production line, there is basically no need for other adjustments on the equipment, and it is a highly economical production process.

The present invention is described in detail below with examples, but the protection scope of the present invention is not limited to the following examples. the

Example 1

(1) Prepare the following components (parts by mass):

a Vinyltriethoxysilane 1;

b propanol 40;

c _SiO2 particles 1;

d Cerium oxide 6;

e deionized water 5;

f Acetic acid 4;

g carbon fiber 5;

h polyimide 1;

(2) Mix the above components and perform aging treatment, then spray, brush or dip on the surface of the substrate, and form a coating on the surface of the substrate after deposition to achieve surface anti-corrosion treatment.

Example 2

(1) Prepare the following components (parts by mass):

a Vinyltriethoxysilane 10;

b propanol 60;

c _SiO2 particles 5;

d Cerium oxide 10;

e deionized water 25;

f Acetic acid 6;

g carbon fiber 7;

h polyimide 3;

(2) Mix the above components and perform aging treatment, then spray, brush or dip on the surface of the substrate, and form a coating on the surface of the substrate after deposition to achieve surface anti-corrosion treatment.

Example 3

(1) Prepare the following components (parts by mass):

a Vinyltriethoxysilane 5;

b propanol 50;

c _SiO2 particles 3;

d Cerium oxide 8;

e deionized water 15;

f Acetic acid 5;

g carbon fiber 6;

h polyimide 2;

(2) Mix the above components and perform aging treatment, then spray, brush or dip on the surface of the substrate, and form a coating on the surface of the substrate after deposition to achieve surface anti-corrosion treatment.

Claims (9)

1. Aromatic-free anti-corrosion process for metal structures, including: (1) Prepare the following components (parts by mass): a vinyltriethoxysilane 1-10; b propanol 40-60; c SiO ₂ particles 1-5; d Cerium oxide 6-10; e deionized water 5-25; f Acetic acid 4-6; g carbon fiber 5-7; h polyimide 1-3; (2) After mixing the above components, perform aging treatment, then spray, brush or dip on the surface of the substrate, and form a coating on the surface of the substrate after deposition to achieve surface anti-corrosion treatment. 2. The non-aromatic hydrocarbon anticorrosion process of the metal structure according to claim 1, characterized in that, the particle diameter of the _SiO2 particles is 50-100 nanometers. 3. The aromatics-free anticorrosion process of the metal structure according to claim 1, characterized in that, the aging treatment is to stand at room temperature for 50-60 hours. 4. The aromatics-free anticorrosion process for the metal structure according to claim 1, wherein the base material is steel or aluminum. 5. The aromatic-free anticorrosion process for the metal structure according to claim 1, wherein the base material is aluminum alloy. 6. The aromatics-free anticorrosion process for metal structures according to claim 1, characterized in that heating is carried out during the deposition process, the heating temperature is 50°C to 150°C, and the heating time is 1 minute to 1 hour. 7. The aromatic-free anticorrosion process for metal structures according to claim 1, wherein the thickness of the coating is 1 micron to 10 microns. 8 . The aromatic-free anticorrosion process for metal structures according to claim 7 , wherein the thickness of the coating is 1 micron to 5 microns. 9. The aromatic-free anti-corrosion process for metal structures according to claim 1, characterized in that, in the step (2), spraying or brushing is used to form a coating on the surface of the substrate.