What are the functions and uses of water based heavy anticorrosive coatings

First, in the field of mild and moderate anti-corrosion, such as the field of anti-corrosion coatings for buildings and steel structures, it is still difficult to develop in the field of heavy anti-corrosion due to technical conditions; The second is the field of furniture coatings (wood coatings), at present, the water-based rate of furniture coatings in China is only about 5%, but water-based coating products show rapid technological development and rapid growth in downstream market demand, and the later development space is huge; The third is the field of automotive coatings, at present, in China's automotive coatings, the primer has been all waterborne, the water-based rate of topcoat has reached about 50%, although the water-based rate of automotive repair coatings is not high, but by a number of key areas represented by Beijing for the requirements of environmental governance of the auto repair industry, and key enterprises have water-based automotive repair coatings technical reserves, the field will also show a rapid growth trend. In addition, the development of water-based container coatings and construction machinery coatings also has great potential.

Materials such as metal, wood, and concrete are often exposed to the atmosphere and are gradually destroyed due to the erosion of moisture, salt spray, gases, acids and alkalis, microorganisms, etc. in the atmosphere. Coating the surface of the object with paint can also isolate the external corrosive medium, prevent corrosion, and prolong the service life.

Tu Heng water-based heavy anticorrosive coatingSo, how does it play a protective role?

1) Shielding.

The basic condition for galvanic corrosion on the surface of steel is that there must be water, oxygen, and ions on the surface of the steel, and the flow (conduction) of ions and electrons. Many coatings are chemically inert to corrosive media such as acids, alkalis, salts, etc., and have a high dielectric constant, preventing the formation of corrosive circuits. For concrete and wood, the shielding effect is purely mechanical isolation.

2) Passivation and corrosion inhibition of pigments.

Pigments are an important part of coatings, and anti-rust pigments interact with metal surfaces to passivate or generate protective substances to improve the protective effect of coatings. In the anti-rust primer, active anti-rust pigments are often used, such as chromate and red dan, etc., which have a certain passivation effect on the metal, and take the chromate system as an example, when a trace amount of water penetrates the paint film, a small amount of dissolved pigment will passivate the substrate. Therefore, corrosion inhibition can make up for the lack of shielding.

In turn, the shielding effect can prevent the loss of corrosion inhibitory ions, so that the corrosion inhibitory effect is stable and lasting.

3) Cathodic protection.

In the coating of paints, if there are metal (metals with lower electrode potential) powders that are more reactive than steel, such as zinc powder or aluminum powder, they can form cathodic protection for the sacrificial anode of steel, as long as the content of these active metal powders reaches the point contact between the metal powder particles and between the metal powder and the steel substrate, the steel can be protected from corrosion. Zinc-rich coatings are typical of this type of functional coatings.

decorative role. Paint has the characteristics of bright, beautiful, bright and gorgeous, pleasing color, etc., it can change the original color of the object, harmonize the color, improve the environment, and beautify life. In national defense, the protective color of the paint is also used to play the role of camouflage and concealment.

Special performance role.

Insulation, anti-corrosion, signing, static conductivity, heat resistance, discoloration, etc.

Logo function: The color of the coating can be used as a sign for the chemicals, pipelines and dangerous goods used in various chemical plants, and the various pipelines, mechanical equipment, and signals on the ship can be coated with various colors of paint as a mark, which can make it easy for operators to identify and operate. Different colors of paint are used on transportation lines to indicate warnings, danger and other signals.

Insulating coatings can play a role in insulation protection in the electrical industry.

Ship antifouling coatings kill or repel marine life that clings to the bottom of the ship.

Some coatings also have special protective effects such as anti-slip and oil resistance.

Heat-resistant coatings can be used in environments even greater than 1000.

The role of coatings is usually achieved by matching coatings (e.g., anti-corrosion coatings) or single coatings (powder coatings, underside paints).

Water-based paint, I believe many people have not heard of this word, in fact, water-based paint is now very popular, water-based anti-corrosion paint is also one of them. But readers, are you familiar with water-based anticorrosive coatings? In fact, the role of water-based anticorrosive coatings is very good, many consumers are very fond of water-based anticorrosive coatings, and water-based anticorrosive coatings have many good characteristics.

Next, let's get to know each other together. So, what are the characteristics of water-based anticorrosive coatings?

Features of water-based anticorrosive coatings

Peculiarity. High solid content and large brushing area; Super anti-corrosion performance, salt spray resistance, solvent resistance, acid and alkali resistance; It is suitable for all kinds of metal substrates, and has strong adhesion; Faster drying and easy construction; Non-toxic, odorless, non-flammable and non-explosive. Reserve.

Store in a cool, dry environment at 5-35 hours in a closed and sealed environment. Please refer to the drum label for the date of manufacture and expiration date.

Introduction to the precautions of water-based anticorrosive coatings

Before the construction of anticorrosive paint, two points must be paid attention to: one is the danger of endangering human health; The second is the danger of **. It is important to understand the safety regulations of the product before applying the paint. For example, Jinnuoxin acrylic engineering primer and Jinnuoxin acrylic engineering topcoat, although there is only a word difference, the function is similar, but in the proportion, use and need to pay attention, once there is an accident, it will endanger human health.

Introduction to the construction method of water-based anticorrosive coatings

Can be used dipping, brushing, spraying method construction, paint should be stirred evenly before painting, if the viscosity is high, you can add an appropriate amount of water, the amount of water should not exceed 10%, should be added while stirring, to ensure that the paint liquid is uniform. Before painting, remove the lime sand, welding slag, oil stain, floating rust and old patent leather on the surface of the workpiece. Ventilation should be maintained during construction, and construction should not be carried out under the condition that the ambient temperature is lower than 5 or the humidity is greater than 70%.

The paint film can be self-drying, or it can be dried at low temperature, the temperature is not less than 5 when self-drying, and the humidity is not more than 70%; When drying, the leveling time is not less than 15 minutes, the baking temperature is not less than 60, and the baking time is not less than 25 minutes. For the second coat, the first pass should be dry, at least 24 hours apart. It is strictly forbidden to mix with other coatings and organic solvents.

At the end of construction, the utensils used should be immediately rinsed with clean water to prevent drying. The remaining paint should be stored in an airtight manner, and if there is dry skin that affects the use, it can be filtered with a 100-mesh wire mesh before use.

Today to introduce to you water-based anticorrosive coatings are so much, I believe you have a certain understanding of water-based anticorrosive coatings, in the choice of water-based anticorrosive coatings, you may wish to consider these methods introduced to you. In fact, the role and characteristics of water-based anticorrosive coatings are very much, many times water-based anticorrosive coatings will be used, but when using water-based anticorrosive coatings, we should also pay attention to it, I hope my introduction can help readers and friends.

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When using paint for house decoration, you need to understand its role and characteristics. What are the special excavation points of heavy anticorrosive coatings? PChouse will take you to find out.

1. Thick film of coating.

Thick film source redundant is an important feature of heavy anticorrosive coatings, the dry film thickness of the general conventional anticorrosive coating is about 100 or 150 microns, and the dry film thickness of heavy anticorrosive coatings is more than 200 or 300 microns, some even reach more than 500 microns, thick protective coating also provides a guarantee for the long-term anti-corrosion life of the coating, but the thick coating construction and heavy anti-corrosion coating production also create new problems.

2. Heavy anticorrosive coatings have high-performance synthetic resins, fillers and pigments.

Heavy anticorrosive coatings need to be hail and roll in harsh environments to achieve long-term anti-corrosion, so they have high requirements for their main film-forming substances, synthetic resins, pigments and fillers.

3. Heavy anticorrosive coatings need to have strict surface treatment.

The right surface treatment can create a clean surface that is easy to spray and can also achieve the right roughness to increase the adhesion of the coating to the substrate before.

4. It is used under harsh conditions and has a long-term anti-corrosion life.

Heavy anticorrosive coatings can be used in extreme environments, generally in the chemical atmosphere and marine environment can be used for more than 10 or 15 years, that is, in a certain temperature environment, in acid and alkali media, generally can also be used for more than 5 years.

The types of heavy anticorrosive coatings are: epoxy resin paint, vinyl chloride paint, chlorinated rubber paint, acrylic paint, fluorocarbon paint, alkyd paint, silicone high-temperature resistant paint, solvent-free anticorrosive coating, and special anticorrosive coating. Compared with conventional anticorrosive coatings, heavy anticorrosive coatings can be applied in relatively harsh corrosive environments, and have a type of anticorrosive coatings that can achieve a longer protection period than conventional anticorrosive coatings.

Features: Heavy anticorrosive coatings can be used under harsh conditions, and have a long-term anti-corrosion life, heavy anticorrosive coatings can generally be used for more than 10 or 15 years in the chemical atmosphere and marine environment, even in acid, alkali, salt and solvent media, and under certain temperature conditions, can also be used for more than 5 years.

Thick film is an important sign of heavy anticorrosive coatings. Generally, the dry film thickness of anticorrosive coatings is about 100 m or 150 m, while the dry film thickness of heavy anticorrosive coatings is more than 200 m or 300 m, and there are 500 m 1000 m, or even up to 2000 m.

Main uses: Heavy anticorrosive coatings are mainly used for offshore facilities, coastal and bay structures, and offshore oil platforms; highway guardrails, bridges, boats, containers, oak trains and railway facilities, automobiles, airport facilities; Hydraulic equipment, water tanks, petroleum refining equipment, oil storage equipment (oil pipes, oil tanks), power transmission and transformation equipment, nuclear power, coal mines and other facilities.

We are inseparable from the paint when we decorate the source jujube, and the paint also plays a great role, our exterior wall paint has good decoration and water resistance, and the paint on the exterior wall will often be washed by wind and rain. Therefore, the exterior wall paint coating should have good water resistance. Then let's find outPaints and coatingsWhat are the anti-corrosion characteristics and what are the precautions for wall brushing, I hope that good coatings should be selected when decorating.

1. What are the anti-corrosion characteristics of coatings.

1. Corrosion resistance of coating: it can be used in acid, alkali, salt and other media for a long time, and the anticorrosive coating has been tested to be soaked in 5%-50% sulfuric acid and 5%-10% hydrochloric acid saturated Ca(OH)2 aqueous solution for 1 year, and the paint film has no change, and the paint film has not changed for 2000 hours in the salt spray test, and can be kept intact for more than 3 years under the condition of long-term outdoor direct sunlight.

2. The paint film is hard, good adhesion, no cracks in impact resistance (1c kg), no peeling off of the paint film, no change in the spiral scratch test, no cracking and peeling off in bending resistance (diameter 10mm shaft).

3. Curing film formation at room temperature, it can be used for a long time under harsh conditions (-40 degrees -150 degrees), and the sea area is immersed in the sea hanging piece test for four months, during which the paint film is intact, and there are no seaweed and other plants, and its anti-fouling (no marine organisms) performance is unexpected.

4. The coating can be directly brushed on the substrate of hail dismantling after certain treatment, which saves the anti-corrosion coating material and also saves the brushing workload, so that the work cost is reduced and the project quality is improved.

5. On the basis of certain treatment, the anticorrosive coating brush and scraping coating, the coating film is dense, the closed cell rate reaches 100%, and the paint film has strong corrosion resistance.

Second, what are the precautions for wall painting.

1. Whether it is a new house or an old house, there are many cracks in the wall. Many people struggle to choose a good latex paint to deal with the problem of cracking the wall. Therefore, when we buy, we should pay attention not only to the function of "anti-fraud and cracking" written on it.

We will buy, we must buy quality and quantity.

2. Presumably, everyone will think that it is better to buy well-known brands when purchasing latex paint. Of course, the products of well-known brands do have a certain quality assurance, but we cannot blindly pursue brands. The quality and function of many general brand products and well-known brand products are not much different, but there is a big difference in **.

Reasonable selection of latex paint.

3. Our people are paying more and more attention to physical health, and we not only have to see whether it is a fake, but also worry about decorative pollution. When we think of decorative pollution, we immediately think of wall paints, so choose good materials when choosing paints.

The above is for you to introduce the anti-corrosion characteristics of the paint coating and what are the precautions for wall brush coating, the coating is also an important part of our decoration, so we should choose a good one when purchasing, so that the wall will not crack, and not beautiful.