Have any friends who make steel structures used Rust King Kong ? What is the specific effect of rus

With Xianghe "four-in-one" rust removal phosphating liquid, one-time rust removal, oil removal, phosphating, passivation, good effect, convenient construction, low cost, short construction period!!

The cost is definitely high, but the effect should be good, there are many similar products, if it is an installed structural repair paint, due to the difficulty of high-altitude rust removal, it is economical to use it.

It has been useful to replace shot blasting with rust transfer diamond, chemical rust transfer, replace primer, prolong paint life, and the construction is also simple Good product.

Once you invest in it, you can benefit for life.

Zhongke Blue Sky is very cost-effective.

Methods include manual rust removal and flame rust removal. The maintenance knowledge of steel structure can be learned on the China Construction Steel Structure Trading Network.

Shot blasting and rust removal, the steel shot is thrown out with a high-speed rotating throwing head, and the steel shot is densely hit on the surface of the component to achieve the purpose of rust removal;

The rust removal methods of the steel structure are: 1. Shot blasting and rust removal, that is: the steel shot is thrown out with a high-speed rotating throwing head, and the steel shot is intensively hit on the surface of the component to achieve the purpose of rust removal; 2. Sandblasting and rust removal, namely:

Quartz sand, corundum sand, copper ore, etc. (** has a big difference) are carried out with high-pressure air and sprayed on the surface of the component for the purpose of steel rust removal; 3. Manual power derusting, that is: using hand-held power tools or sandpaper, wind shovels and other tools to remove rust on the surface of the steel structure; 4. Flame rust removal: the surface of the component is baked by a concentrated flame, and the two are separated because of the different thermal expansion coefficients of rust and steel.

The first two methods are thorough in rust removal, and the third method is used in the case of small area and no rust removal equipment; The fourth method is only used when there is no equipment and the requirements are not high.

What are the methods of steel structure rust removal, which method is good?

Manual sandpaper grinding, machine grinding, chemical rust removal, now environmental protection does not allow grinding and rust removal, basically using rust removers to remove rust, simple and efficient.

One is shot blasting, the other is sandblasting, the former is more economical and commonly used, mainly depends on what specific requirements you have, there are no special requirements 90% of the project is used for shot blasting rust removal.

Steel structure anti-rust paint, Luo Balu cold galvanized paint about 100 yuan per kilogram, can be coated two squares, plus labor costs can know how much.

Labor and materials together, a square thirty yuan like this. I'm doing this, please reply if you need it.

The steel structure is installed 30 square meters, and the rust removal is 1 square plus 2 yuan.

Look at the surface rust removal method and the thickness of the paint and the paint brand, as well as whether the above materials are provided.

If you don't get anything, that's going to be costly. Welcome to contact us by private message.

5% hydrochloric acid plus 3% corrosion inhibitor to remove rust.

Grading:

The surface of the A-grade steel is completely covered with adhered oxide scale and is virtually rust-free.

The surface of the B-grade steel has begun to corrode and the oxide scale has begun to fall off in flakes.

Grade C The oxide scale on the surface of the steel is corroded or scraped off, but slight rust spots are visible to the naked eye.

Grade D The oxide scale on the surface of the steel has rusted and peeled off, and a large number of rust spots can be seen with the naked eye.

Rust removal method and grade division of steel structure A large amount of steel is required in the engineering design of steel structure, but if a large amount of steel is rusted during construction, it will greatly shorten the service life. It is also a challenge to personal safety, the collapse of the house is not uncommon, and in recent years, more and more attention has been paid to it, today I will teach you some rust removal methods!

1. Pickling and rust removal is to soak the steel components to be coated in the acid pool, and use acid to remove the oil and rust on the surface of the components. The pickling process is also highly efficient, and the rust removal is more thorough, but after pickling, the components must be rinsed with hot water or clean water, and if there is residual acid, the rust of the components will be more severe.

2. Manual rust removal is done by manually using some relatively simple tools, such as scrapers, grinding wheels, abrasive cloths, wire brushes and other tools to remove rust on steel components. This method has low work efficiency, poor working conditions, and incomplete rust removal.

3. Sandblasting and rust removal is a rust removal method that uses the pressure of compressed air to continuously impact the surface of steel components with quartz sand or iron sand, and cleans up the rust, oil and other debris on the surface of the steel to expose the true color of the metal steel. This method has high efficiency and thorough rust removal, and is a relatively advanced rust removal process.

1. The standard for steel surface corrosion and rust removal grade is the national standard GB8923-88 "Steel Surface Corrosion Grade and Rust Removal Grade before Painting" [you can search for it].

2. The standard divides the rust removal grade into three types: jet or projectile rust removal, manual and electric descaling, and flame descaling.

3 Jet and projectile rust removal, represented by the letter "sa", are divided into four grades.

ST1 - means general manual and power tool rust removal, no floating rust on the surface of the steel, no visible grease and dirt, no unstable oxide scale, floating rust and floating dust.

ST2—Indicates thorough rust removal by hand and power tools. The surface of the steel should be free of visible grease and dirt. And there are no adhesions such as poor oxide scale, rust and old paint coatings.

ST3 — indicates a very thorough removal of rust from hand and power tools. The surface of the steel should be free of visible grease and dirt, and there should be no adhesions such as oxide scale, rust and paint coating, rust removal should be more thorough than ST2 level, and the surface of the substrate should show a metallic luster.

methods of rust removal;

1. Wire brush cleaningWhen the wire brush is rust removed and cleaned, the air or electric rotating wire brush is generally used. This method is not suitable for removing oxide scale, etc., but is suitable for pretreatment of floating rust.

2. The rust removal method of manual knocking or power tool knocking is usually used together with the wire brush rust removal method.

This method is sometimes also suitable for the surface treatment of steel before traditional paint coating and the local repair of other paint systems, which is generally used to clean up thick oxide scale and remove thick rust layers, so that it can be more economical to remove rust in the future.

3 Grinding wheel rust removal Grinding wheel rust removal is a method of using pneumatic or electrically rotating elastic grinding wheels to polish the surface of steel for rust removal, which is suitable for local rust removal and weld treatment.

This is a more effective method of rust removal, which can obtain a more satisfactory effect than wire brush rust removal or knock production rust removal.

Steel structure rust removal grade and rust grade.

Corrosion grade and derusting grade of steel surface before painting

gb8923-88

Visual ratings.

The corrosion grade is divided into A,

B, C, D A grade is fully covered with oxide scale and there is almost no rust on the surface of the steel grade B has been corroded, and part of the oxide scale has peeled off the steel surface C oxide scale has been peeled off due to rust or can be scraped off, and there is a small amount of pitting on the surface of the steel D oxide scale has been fully peeled off due to rust, and the steel surface rust removal grade 1 has generally occurred pitting corrosion

Jet or projectile rust removal grade.

Represented by the letters sa, respectively.

sa1、sa2、

SA3SA1 is a mild jet or projectile rust removal.

SA2 is thorough.

for being very thorough.

SA3 is the 2 that makes the steel apparently clean

Hand and power tool rust removal grades.

The letters ST represent ST2

for thoroughness. ST3 is very thorough and divided.

bst3cst3

dst3 3、

Flame rust removal grade.

The letter F1 represents ---

The surface of the steel should be free of oxide scale, rust and paint coating.

objects, any remaining traces should only be surface discoloration (dark shadows of different colors).

1. The corrosion grade of the steel structure is divided into 4:

Grade A: The surface of the steel is fully covered with oxide scale and almost no rust;

Grade B: The surface of the steel has been corroded, and some of the oxide scale has been corroded;

Grade C: The oxide scale on the surface of the steel is peeled off due to rust, or it can be scraped off with a small amount of pitting;

Grade D: The surface of the steel is fully peeled due to corrosion, and pitting corrosion is common.

Two: How to remove rust:

1. For general components without erosion: manual and power tools can be used to remove rust; Rust removal grade ST2 or ST3;

2. For load-bearing structures with weak erosion effect: spraying (pellet, sand) can be used to remove rust; Rust removal grade SA2 or ST2 1 2;

3. For load-bearing structures with moderate erosion effect: spraying (pills, sand) can be used to remove rust; Rust removal grade ST2 1 2.

The above answers hope to help you solve your doubts.

First use gasoline to get the rust out, and then spray the oil and it's OK, the grade is mild, severe, super severe.

You can use hydrochloric acid to remove rust, but be aware that hydrochloric acid is corrosive and cannot be used on your hands.

You can't just paint the outside, the inside will continue to rust and it will fall off easily.

To remove the rust on the outside, use an electric brush.

Then apply anti-rust paint before you can brush or spray paint.

The steel structure must be brushed with anti-rust paint 2-3 times before it can be sprayed and brushed with paint when it is dry, otherwise it will inevitably rust. All engineering steels are painted with several layers of orange-red anti-rust paint to avoid rust.

No, the rusty place on the surface of the steel structure must be polished clean, and the rusted periphery needs to be polished clean, and then the cold galvanized paint with high zinc content can be applied to prevent rust.

There are many rust removal methods, which can be roughly divided into four categories: manual treatment, mechanical treatment, chemical treatment, and ultrasonic treatment.

1. Manual rust removal method.

This is the easiest way to remove rust. Use scrapers, hammers, steel brushes, abrasive cloths (paper), grinding wheels and other tools to knock, shovel, grind, scrape, etc. to remove rust. The advantages of this method are simplicity and low cost; The disadvantages are high labor intensity, low work efficiency, unstable quality, and poor working environment.

2. Mechanical rust removal method.

This method is a widely used rust removal method at present, and its principle is to effectively remove rust and its dirt by impact and friction.

The tools commonly used in this method include portable electric grinding wheels, electric brushes, pneumatic brushes, rust removal guns, etc. The advantage of this method is that the quality and efficiency of rust removal are higher, but the disadvantage is that these tools also need manual operation, and the labor intensity is larger, and it is not suitable for complex geometric shapes and precision parts, and it is not suitable for the needs of large-scale rust removal.

3. Chemical treatment method.

The chemical treatment method, also known as pickling, is based on the principle of using acid to react with the rust (oxide) on the surface of the metal to be cleaned to dissolve it in the acid, and the hydrogen produced by the interaction between the acid and the metal makes the oxide scale mechanically fall off.

Dilute hydrochloric acidBe careful not to soak the rusty stuff in it for too long, otherwise the contents will be reacted after the surface rust is removed, for example, the rust will react with the iron after the rust is removed.

Sandblasting and shot blasting can also be used, see the following instructions for details:

1. Small pneumatic or electric rust removal. It is mainly powered by electricity or compressed air, equipped with appropriate rust removal devices, and carries out reciprocating motion or rotary motion to meet the rust removal requirements of various occasions. Such as angle grinder, wire brush, pneumatic needle beam deruster, pneumatic knocking rust hammer, tooth type rotary deruster, etc., belong to semi-mechanized equipment, the tool is lightweight, maneuverable, can remove rust and old coating more thoroughly, can carry out hair treatment on the coating, the efficiency is greatly improved than manual rust removal, up to 1 2m2 h, but can not remove the oxide scale, the surface roughness is small, can not achieve high-quality surface treatment quality, the work efficiency is lower than the jet treatment.

It can be used in any part of the body, especially in the process of ship repair.

2. Shot peening (sand) rust removal. It is mainly composed of particle jet erosion to achieve surface cleanliness and suitable roughness, and the equipment includes open shot peening (sand) rust removal machine, closed shot peening (sand chamber), vacuum shot peening (sand) machine. The open shot blasting (sand) machine is widely used, which can completely remove all impurities on the metal surface, such as oxide scale, rust and old paint film, with a high rust removal efficiency of 4 5m2 h, a high degree of machinery, and rust removal.

However, because the abrasives generally cannot be used, it has an impact on other operations, and it is troublesome to clean up the site. Therefore, the environmental pollution is heavier, and the use has been gradually restricted recently.

3. High-pressure water abrasive rust removal. The impact action of high-pressure water jets (plus the grinding action of abrasives) and water skid are used to destroy the adhesion of rust and coating to steel plates. It is characterized by no dust pollution, no damage to the steel plate, and greatly improves the rust removal efficiency, which can reach more than 15m2 h.

However, the steel plate after rust removal is easy to return to rust, and it is necessary to coat a special wet derusting coating, which has a great impact on the coating of general performance coatings.

4. Shot blasting and rust removal. Shot blasting is the use of high-speed rotating impeller to throw abrasive to the surface of steel to achieve the purpose of rust removal, is a more advanced mechanical treatment method for hull steel rust removal, not only high production efficiency, but also low cost, high degree of automation, can realize assembly line operation, less environmental pollution, but only indoor operation.

3) Chemical rust removal is mainly a rust removal method that uses acid to react with metal oxides to remove rust products on the metal surface, that is, pickling and rust removal, which can only be operated in the workshop.

1. Soaking method: Some small items are soaked in anti-rust grease and a layer of anti-rust grease is adhered to their surface. The oil film thickness can be achieved by controlling the temperature or viscosity of the anti-rust grease.

2. The brushing method is used for outdoor construction equipment or products with special shapes that are not suitable for soaking or spraying, and it is necessary to pay attention not to accumulate and prevent leakage when brushing.

3. Spray method: Some large rust prevention materials can not be oiled by immersion method, and are generally sprayed in a clean air place with filtered compressed air of about pressure. The spray method is suitable for solvent-diluted anti-rust oil or thin layer anti-rust oil, but perfect fire protection and labor protection measures must be adopted.

Electroplating, electroless plating, hot plating and other methods are also surface treatment methods, which can consider different costs of rust prevention methods according to factors such as different steels, different parts and different parts and values.

Ask what to do without surface treatment.

The surface is coated with anti-rust paint.

Question: What should I do if there is no oil on the surface All of your above are not allowed.

I am not allowed to have oil on the surface now, there is no water-based anti-rust product, and it can have an anti-rust effect after spraying.

The emulsified rust inhibitor of Amo anti-rust is also a high-quality product of oil-free anti-rust. So it's more environmentally friendly. The cost is also low.

Ask a question, okay, I'll take a look.