The hottest steel structure coating is expected to

2022-10-14
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Steel structure coating is expected to fully use water-based coatings

steel structure coating is expected to fully use water-based coatings

June 19, 2019

the air pollution source of steel structure factory is mainly the surface painting process. Now the surface painting of steel structure factory adopts traditional paint spraying, which leads to pungent odor, pollution exceeding the standard, and the environmental impact assessment is not passed. The environmental protection bureau often inspects it, seriously affecting the production and development of the enterprise

first, the main reasons for the failure of the environmental impact assessment of the steel structure factory

the products of the steel structure factory must be coated before leaving the factory, mainly for rust prevention and corrosion prevention. Main functions of the coating used: the materials used for metal Charpy impact test are mainly chlorosulfonated polyethylene anticorrosive coating, iron red phenolic resin antirust coating and a small amount of alkyd blended coating. These coatings produce a lot of organic waste gas in the process of spraying and curing, which not only tastes pungent, but also causes serious environmental pollution

II. Hazards of spraying high concentration VOCs paint in steel structure factory

1 Serious air pollution

coatings are widely used in steel structure factories. During the use, a large number of organic volatiles are discharged into the atmosphere, making the atmospheric environment a victim of enterprise development

experts say that traditional coatings contain a large number of VOCs, which will volatilize a large number of toxic chemicals during use. Among them, benzene, formaldehyde and xylene are toxic and harmful chemical gases. In China, 7million tons of organic volatiles are emitted into the atmosphere every year when coatings are used. Therefore, the huge "influence" of VOCs on air pollution can be seen

the impact of air pollution on human health is fatal. According to the latest statistics released by who, 7million people died from "air pollution" worldwide in 2012, which is more than twice as high as before. It is equivalent to one in every eight deaths in the world caused by air pollution

2. Serious waste of resources

more than 50% of the components of traditional coatings are their stiffness, and the organic solvent extracted from oil can be selected within a certain range. In the process of film formation, the organic solvent will volatilize into the air, which causes a lot of waste of resources

experts pointed out that if a coating enterprise with a production capacity of 125000 tons is taken as an example, it will consume 200000 tons of oil every year, which is equivalent to 268000 tons of relatively standard coal. This is only the data of an enterprise. If the oil consumed by the industry in the production of coatings every year is accumulated, the total oil consumption will be huge

3. Safety problems

vocs are flammable and explosive gases. There are great potential safety hazards in the production and use process, just like a stealth bomb around people, which will threaten the safety of users at any time. At present, VOCs have been listed in the environmental management registration of hazardous chemicals by the state

in many previous reports, there are countless cases of explosion of traditional coatings in the process of use and storage, and the tragic cases of disability and even death are worrying

4. Fatal "occupational disease"

experts believe that the life safety of workers in high concentration VOCs gas is even more worrying, and the working environment of workers is like a dangerous "minefield". Paint contains a lot of toxic volatile substances, including formaldehyde, benzene, xylene, etc. Some research reports believe that long-term exposure to organic compounds, at least, makes people prone to fatigue, memory loss, and inattention; The most important thing is that there are persistent personality and emotional changes such as fatigue, emotional instability, decreased self-control and autonomy; Whether in the low-end or high-end market, those who are more serious have mental impairment, dementia, loss of work ability and so on. Long term repeated exposure to low concentrations of benzene can cause chronic poisoning and damage the nervous system and hematopoietic system. At the same time, it will also affect the growth and development of the next generation, such as causing birth deformities. However, these serious symptoms in the eyes of outsiders are only "mild symptoms" of occupational diseases in the eyes of workers

when working in the workshop, workers must wear special masks for production to reduce the inhalation of organic volatiles in the production process. However, for people who have been engaged in production operations for a long time, wearing masks has limited effect on preventing the inhalation of toxic substances. It is common for workers to faint and vomit during operation, while most of the workers who have been engaged in paint production for many years suffer from occupational diseases, and even lead to lifelong disability of some workers

III. The best substitute for coating in steel structure factory

the best substitute for traditional coating is new environmental protection coating, such as water-based industrial paint. All water-based coatings use water as diluent, do not use organic solvents, do not contain organic solvents, do not contain benzene, toluene, xylene, formaldehyde, free TDI toxic heavy metals, non-toxic, non irritating smell, harmless to human body, do not pollute the environment, the paint film is plump, transparent, flexible, and water-resistant, wear-resistant, aging resistant, yellowing resistant, fast drying, easy to use

IV. product performance advantages of waterborne industrial coatings

1 Starting from the innovative film-forming mechanism, the fast drying

water-based industrial coating adopts new water-based polymer and advanced production process, which optimizes the cross-linking density of the film, improves the mechanical properties and weather resistance of the film, and abandons the incomplete supporting processes currently used abroad, which not only realizes the one-time coating of water-based high gloss achromatic finish paint (no need to spray varnish), but also reduces the operation process Energy saving and consumption reduction, and the drying process is simplified. It only needs 20 minutes of drying at 75 ℃. It can also be dried at room temperature

2. Simple construction

without using special spraying tools, high-quality construction operations can be carried out with ordinary spray guns. Water is used as the solvent from primer to topcoat, simplifying the cleaning process of equipment and tools. Using water as the cleaning agent reduces the consumption of organic solvents, and puts an end to the excessive use of benzene containing solvents. G é rald durski, director of engineering plastics of Solvay's high-performance polyamide global business department, said that it causes pollution damage to the surrounding environment, and greatly reduces the occurrence of occupational diseases, which is more conducive to the health of front-line operators

3. Energy saving and consumption reduction

water based industrial coatings, from primer to finish, all use water as diluent and cleaning agent, fundamentally eliminating the reserve consumption and use of organic solvents

waterborne industrial coatings do not contain harmful components such as xylene and butyl acetate, reducing environmental pollution

waterborne industrial coatings improve the drying conditions, reduce energy consumption, reduce the requirements for equipment, and reduce a series of work requirements such as safety production, fire prevention measures, etc

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