How to deal with rust in steel structure workshop

Japli steel rust and rust inhibitor is a new type of rust and rust inhibitor, which can replace the rust and rust primer by directly painting a layer on the surface of rusty steel, and the rust and rust prevention can be completed in one step by brushing a layer, replacing the traditional sandblasting shot blasting manual grinding, and can treat 15-17 square meters per kg.

Please shake this product well before use;

Immersion method. Soak the rusty or rust-free workpiece in 030 solution for 10 minutes to 30 minutes (the rusty workpiece is subject to the complete rust reaction on the surface, and the rust-free workpiece can be used for 10 minutes), take it out, and place it in a dry and ventilated place to dry for 12 24 hours (not exposed to the sun). Then the workpiece can be immersed in the 031 sealant produced by our company, and immediately taken out to dry.

If a longer period of anti-corrosion is required, appropriate anti-corrosion paint and topcoat can be selected for subsequent coating processes;

Brushing method. Use brushes, roller brushes, spray guns and other tools to coat this product on the surface of the rusty steel workpiece (rusty or rust-free surface can be), apply to the surface wetting and wetting, after the rust on the surface of the workpiece is completely reacted, place it in a dry and ventilated place to dry for 12 24 hours (can not be exposed to the sun). The workpiece can be immersed in the 031 sealant produced by our company, evenly sprayed or brushed, and dried.

If a longer period of anti-corrosion is required, appropriate anti-corrosion paint and topcoat can be selected for subsequent coating processes;

The processed workpiece should be placed vertically or at an angle to the vertical direction. If the workpiece is placed horizontally, after treatment with 030 for about 20 minutes, wipe off the residue of 030 on the surface with a rag to avoid the formation of a loose film layer of residual liquid;

5) For workpieces (precision instruments, equipment, etc.) with high surface requirements, wipe the residual liquid on the surface with cotton balls and cloths after 20-30 minutes after treatment (immersion, brushing, etc.) with this product;

6) Environmental requirements for self-drying film formation: temperature -10 50, the best is about 25, relative humidity.

60%; The working environment should have good ventilation conditions to make the air flow around the workpiece; When the temperature is too low, the product can be heated appropriately. For outdoor construction, sunny and dry weather should be selected, but it should not be exposed to the sun, which will lead to loose film layer and easy peeling;

If the steel structure workshop is rusty, it will affect the stability of the steel structure, and the safety of the workers working in the plant will be threatened

1. Pickling and rust removal, which is to immerse 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 to remove rust from steel components by manually using some relatively simple tools, such as scrapers, grinding wheels, abrasive cloths, wire brushes and other tools. 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 to clean up the rust, oil and other debris on the surface of the steel and 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.

The steel structure workshop is generally rusty, and it is more difficult to deal with the rusty place, which leads to the inability to apply anti-rust coatings. Recently, Robaru Company has launched a new product, Robaru water-based rust-to-silver coating, which is a water-based coating directly with rust; If the paint is painted with rust, you only need to simply treat the floating rust on the surface of the steel structure, and you can directly apply it to the surface of the rusty steel structure and directly cover the rust. One-component, low VOC to prevent rust spread and protect steel structures.

What is the specific content of the rust removal method of the steel structure workshop, the following Zhongda Consulting will answer for you.

1. Pickling and rust removal: Pickling and rust removal, also known as chemical rust removal, is to use the acid in the pickling solution to carry out chemical reactions with metal oxides to dissolve the metal oxides on the surface of the steel structure and remove the rust and dirt on the surface of the steel structure. However, pickling cannot achieve the surface roughness effect of shot blasting or shot peening.

And after pickling and rust removal, it must be cleaned with a large amount of water and passivated. 2. Sandblasting and rust removal: a rust removal method that uses high-pressure air to bring out quartz sand and spray it onto the surface of the steel structure workshop.

The rust removal is completely manual operation, and the surface roughness of the component after rust removal is small, and it is not easy to meet the requirements of friction coefficient. 3. Spray the surface of the steel structure workshop with a non-metallic protective layer containing jujubes to isolate the contact of steel in the air and achieve the purpose of rust prevention.

The steel structure is rusty, if it is white rust, it can be sanded and removed. If there is red rust, considering the rust removal efficiency, it is recommended to use power tools for grinding and rust removal. After the surface treatment is clean, spray hot-dip galvanized repair special coating, it is recommended not to consider self-spraying paint, silver powder paint, this kind of paint is color paint, no anti-rust effect.

Manual rust removal: It is mainly a method of using hammers, shovels, knives, steel wires, brushes, and coarse abrasive cloth (paper) to treat the metal surface with rust and meet the requirements of rust removal.

Power tool rust removal: It is mainly a method to use air (electric) brush wheels or various derusting machines to treat the surface with rust and meet the requirements of rust removal.

Shot blasting and rust removal: It is mainly a way to achieve rust removal by driving the abrasive material to impact the rusty steel plate with the help of oil-free compressed air.

Steel structures are prone to rust in some specific environments, especially in environments with corrosive media, and must be painted or galvanized, and should also be regularly maintained during use.

There are three types of paints that can be used outdoors, according to the rust prevention period:

1. The anti-rust period is 1 to 2 years. Choose alkyd paint. Alkyd paint is the best choice for pure civil paint, alkyd paint is bright, suitable for painting doors at home, and outdoor railings are rust-proof. **Low, colorful, convenient and simple construction.

2. The anti-rust period is 5 to 8 years, and acrylic polyurethane paint is selected. Acrylic polyurethane paint is a hot selling paint. The anti-rust life is moderate, and the alkyd paint is eliminated for one to two years.

According to national regulations, the steel structure workshop is generally maintained once every 3 to 5 years, and anti-rust paint must be applied if it rusts.

If you have money, you can buy rust remover, and if you don't have money, you can buy gasoline thinner, and then repaint after cleaning.

Remove rust and paint and do a maintenance.

Steel structure with its good seismic performance and excellent thermal insulation, has become a dark horse in the rural self-built house, more and more people began to light steel villas as the first choice for building houses, although it has a lot of benefits, but there are still a few places that we need to be familiar with and master.

Generally speaking, the rust removal of light steel villas can be divided into the following types, namely: shot blasting rust removal, shot blasting rust removal, sand blasting rust removal, pickling rust removal and so on.

Shot blasting rust removal: a method that uses the high-speed operation of mechanical equipment to throw a steel shot of a certain particle size by the centrifugal force of the throwing head, and the thrown steel shot collides violently with the component to achieve the purpose of removing the rust on the steel surface.

Shot blasting and rust removal: a rust removal method that uses high-pressure air to bring out the steel shot and spray it onto the surface of the component.

Sandblasting rust removal: the use of high-pressure air to bring out the quartz sand sprayed to the surface of the component to achieve a rust removal method, quartz sand has many kinds, mainly river sand, sea sand and artificial sand, low cost, but it should be noted that the above two rust removal methods require less than 85% of the environmental humidity.

Pickling and rust removal: This rust removal method is easy to understand in the literal sense, pickling, also known as chemical rust removal, uses the acid in some acidic solution to carry out a chemical reaction with the light steel keel to remove the rust on the surface.

However, this method is rarely used because it will cause environmental pollution, and if the solution ratio is improper in the treatment process, it will also cause excessive corrosion of the metal surface.

Pay attention to this number, there are new houses every day, and there are neighbors who show their homes, and they can master the tips for building houses and saving money.

What are the causes of corrosion and rust prevention of steel structures?

There are many causes of corrosion in steel structures. In terms of environment, it should be avoided that the steel structure is exposed to relatively large relative humidity for a long time, and the acid, salt and other chemicals in the environment will accelerate the corrosion of the steel structure; The second is that the design is unreasonable, for example: the steel frame and the wall are too close to each other; During construction, corrosion can also occur due to the lack of strict inspection of coating quality control and coating film thickness.

The corrosion and rust of the steel structure is very harmful, which will not only reduce the strength and bearing capacity of the steel structure, but also may cause deformation, fracture and collapse of the steel structure due to corrosion, which will cause huge losses once the accident is caused. Therefore, doing a good job of anti-corrosion is an important work of steel structure building, and anti-corrosion coatings can be used to prevent corrosion of steel structures. From the aspects of anti-corrosion life, gloss and color retention of the coating, whether it is easy to maintain, etc., it is advisable to use long-term anti-corrosion coatings with a total paint film thickness of not less than 150 m for outdoor steel structures.

The indoor steel structure should be made of iron red alkyd primer, one degree of cloud alkyd antirust paint, two degrees of alkyd topcoat, and the total thickness of the paint film is 160 m.