Does epoxy primer need to be sanded? Can epoxy primer be used for primer?

First, look at the specific process requirements.

Whether you want to polish or not, first of all, you have to look at the process requirements, if the sprayed product is okay, the paint film effect is acceptable, then you can not polish. Generally speaking, there will be some floating dust on the surface after spraying paint once, and if you spray the next paint directly without polishing, sometimes there will be particles on the surface. Therefore, the normal painting process is that each paint needs to be polished once, and the degree of each polishing and sandpaper depends on the specific situation.

2. The following processes can reduce the grinding after epoxy primer spraying.

1. Iron and steel: sandblasting to grade.

2. Steel coated with workshop primer: use swept sandblasting or pneumatic (electric) tools for secondary rust removal, and the derusting quality reaches ST3 level.

3. With the old paint film that can be matched: remove all the oil and debris.

4. It will be coated with zinc powder.

Primer of steel: Remove all oil, debris and zinc salts.

5. Galvanized steel: remove all oil, debris and zinc salts with elastic grinding wheels, and use light sand blasting for surface treatment if used in underwater parts.

6. Unexposed zinc-sprayed steel: remove all oil and zinc salts.

Hello: If you spray epoxy primer, you don't need to sand, and sanding will reduce the role of the primer.

It needs to be coarsely sanded to improve adhesion.

Can epoxy primer be used for primer: Yes. It can refer to the time deficit of using epoxy intermediate paint as the primer of the steel surface, and its adhesion and anti-rust performance meet the needs of general paint.

However, it is necessary to divide the environment, and some environments are suitable for filming, referring to the epoxy intermediate paint as a primer, which can achieve the same effect as the epoxy primer. For example, the following environments are not good: there are strict requirements for adhesion, such as vehicle coating, glass hall loss steel product coating, etc.

If there is a requirement of more than 10 years for the use period, it is inconvenient to recoat. In moderately or above corrosive environments, most of them require epoxy zinc-rich primers, inorganic zinc-rich primers, and cold-dip galvanized paints as anti-corrosion primers.

Epoxy paint is a general term for epoxy resin coatings, which includes many branches, including primer, intermediate paint and topcoat according to the type of coating.

Commonly used topcoat: epoxy anticorrosive topcoat Commonly used intermediate paint: epoxy micaceous iron intermediate paint Commonly used primer:

Epoxy primer, epoxy zinc phosphate primer, epoxy sealing primer There are other types of epoxy paint: epoxy coal asphalt paint (including primer and topcoat), epoxy phenolic paint (including primer and topcoat), epoxy glass flake paint (including primer and topcoat) Epoxy paint is used as a primer and intermediate paint, because this type of paint has very good adhesion and anti-corrosion, but for external ultraviolet rays.

Poor resistance and weather resistance is required.

For topcoat, the commonly used supporting systems are as follows: epoxy primer + epoxy micaceous iron intermediate paint + fluorocarbon paint.

Epoxy primer + acrylic polyurethane topcoat Epoxy sealing primer + epoxy primer + acrylic polyurethane topcoat.

Epoxy primer can be used for primer in the middle coat. Two-component epoxy coatings are also called epoxy high-strength coatings. Modified epoxy resin is mainly used as the main film-forming material, and solvent-free is achieved by using reactive dilution toughener.

It gives the coating good adhesion, excellent chemical stability and mechanical properties. The addition of flake filler to the solvent-free epoxy primer can not only improve the mechanical properties of the coating, but also play a good role in coating shielding and have a good anti-corrosion effect. The supporting curing agent of solvent-free epoxy coating has low viscosity, and the cured coating has good anti-corrosion performance, hardness, toughness and compactness.

Epoxy primer is an important decorative material, generally speaking, it is used as a primer, with anti-rust and anti-corrosion effect, in the process of construction, if the epoxy primer has been sprayed, do you need to polish it later? What is the difference between an epoxy primer and an anti-rust paint?

1. Do I still need to polish after spraying epoxy primer?

Under normal circumstances, it needs to be sanded again, and according to the regular process, every time the paint is sprayed, it needs to be sanded. The degree of grinding should also be determined according to the specific situation of the sandpaper, because after spraying the epoxy primer, a layer of floating dust will be formed on the surface, if you do not polish, continue to paint, it will cause the surface to be grainy, uneven to the touch, and there will be a burr feeling.

2. Is there a difference between epoxy primer and anti-rust paint?

Although epoxy primer and anti-rust paint can be used as primers, there is still a big difference between the two after a detailed comparison.

1. The first difference is manifested in the use, epoxy primer is generally used as a protective measure for anti-corrosion, and is widely used in some oil pipelines or chemical facilities, including marine facilities. However, anti-rust paint is generally used in the large fiber of the jujube residents to dismantle the door or guardrail, and the color requirements are not particularly high.

2. The second difference is that there is a difference in composition, the main component of epoxy primer is epoxy resin, and there is also a part of the curing agent combination. The main component of anti-embroidery paint is a one-component coating, which can be used directly.

3. The third difference is that in terms of performance, the chemical properties of epoxy primer are relatively active, and it is easy to react with the corrosive medium, so as to protect the material from corrosion, and the corrosion performance will be better. Anti-rust paint can protect the surface of steel, generally speaking, it cannot achieve deep protection, Hu state belongs to physical anti-corrosion, so compared with epoxy primer, its anti-rust and anti-corrosion performance is slightly worse.

Summary: If you choose an epoxy primer, according to the convention, you need to polish it once to make the surface smoother and achieve the effect of painting.

The use of some epoxy primer, in order to be able to have a certain protection at the bottom of the container, epoxy primer is a relatively new type of paint material, since the ring loss of Kai oxygen primer on the market has been welcomed by everyone, now many factories in the use of some metal containers, will find a way not to let the container corrode. Let's introduce to you how to use epoxy primer and how to use epoxy primerEpoxy primerHow to use.

1. How to use epoxy primer.

1. Ground treatment: polishing, repairing, decontamination and dust removal according to the ground condition;

2. Epoxy primer: Epoxy primer with strong permeability and adhesion is used to enhance surface adhesion;

3. Epoxy mortar: add an appropriate amount of quartz sand with epoxy two-component, and coat it with a trowel to achieve the required number of layers;

4. Epoxy putty: add an appropriate amount of putty powder to the epoxy double-group pinfield, and evenly coat it one to two with a trowel to increase the flatness of the ground;

5. Epoxy paint: one or two coats are rolled with epoxy paint;

6. Epoxy topcoat: Roll one with epoxy topcoat to make the ground bright and wear-resistant;

2. Epoxy zinc-rich paint primer color.

1. There are many components of epoxy zinc-rich primer, which are ethyl silicate as raw material, thickener, epoxy resin, zinc powder, filler, additives and solvents as auxiliary materials, and epoxy zinc-rich primer belongs to special coatings. In general, it is a metal primer, steel pipe, storage tank, steel structure, container material, which means that epoxy zinc-rich primer has its own special purpose, and epoxy zinc-rich primer is required for protective coating. Epoxy zinc-rich primers are industrial primers that we may rarely use when decorating our homes.

2. Epoxy zinc-rich primer may not be as gorgeous as we imagined, because its main purpose is to protect metal materials, so its color is relatively simple, and the common one is black gray, which is the color of steel. This color is so that it will not look too eye-catching in the process of painting, which is in line with the calm characteristics of heavy industry. Features of epoxy zinc-rich primer:

Naturally, it dries quickly, has strong adhesion and has an obvious anti-corrosion effect, so it can protect these metal objects well. The important thing is that the epoxy zinc-rich primer is rich in zinc, so the cathodic protection and water resistance are excellent.

3. Since the epoxy zinc-rich primer contains certain chemical components, during the painting process, it is recommended that the painting workers wear masks to work, which can prevent breathing a lot of chemical gases. During the painting process, it is necessary to keep the surface of the painted object clean and dry, without any oil stains and rust, so as not to affect the painting effect of epoxy zinc-rich primer; After the epoxy zinc-rich primer is opened, it must be used up within 6 hours, after all, there is a possibility of oxidation in contact with air; In the process of painting, it is only necessary to apply evenly, but when opening the epoxy zinc-rich primer, be sure to stir the primer to avoid precipitation.

The above article is to introduce you to epoxy primer, you must choose a regular product, because there are many counterfeit products on the market now. Counterfeit products do not have a high safety factor. That's all for today, I hope we found it helpful.