With the development of China's national economy, the country continues to increase investment in infrastructure construction and speed up its construction. In this process, the construction of infrastructure has also driven the development of a series of industries and promoted the continuous progress and improvement of various technologies. With the trend of infrastructure design from reinforced concrete to steel structure, coatings are facing new requirements, especially in terms of anti-corrosion protection life of coatings, coating performance of materials, seasonal versatility of materials and environmental friendliness.

According to the data of China Corrosion Survey Report, the annual loss caused by metal material corrosion alone in China is up to 500 billion yuan, accounting for about 5% of the gross national product! Among them, the oil and gas system is about 10 billion yuan, the coal industry is about 5.5 billion yuan, and the power system is about 1.6 billion yuan. However, the total industrial output value of the entire coating industry minus raw materials is only half of it. It can be seen from this that there is much room for anti-corrosion coatings.

Today's anti-corrosion coating products are widely made of products from petroleum industry, coke refining industry, organic synthetic chemical industry and other departments, with more and more quality and expanding application scope. How to further accelerate the development of anti-corrosion coating field and make it better serve all walks of life is a glorious and arduous task for us coating people.

In the broad market environment of anti-corrosive coatings, only by bravely taking technological innovation as the driving force, taking environmental protection as their own responsibility, and constantly developing new technologies and new products, can the coating people continuously expand the application scope of anti-corrosive coatings and contribute their own strength to China's infrastructure and marine chemical industry.

1、 Development Status of Anticorrosive Coatings

Anticorrosive coatings are widely used in modern industry, transportation, energy, marine engineering and other sectors. According to the corrosion resistance degree and application requirements of the coating film, it is generally divided into conventional type and heavy anti-corrosion type.

Conventional anticorrosive coatings can prevent corrosion of metals and protect the service life of nonferrous metals under general conditions; Heavy duty anti-corrosion coating refers to a kind of anti-corrosion coating that can be applied in relatively harsh corrosion environment and has a longer protection period than conventional anti-corrosion coating.

1. The product is developing towards multi-function

According to incomplete statistics, there are more than 1000 varieties of anticorrosive coatings in China. Traditionally, epoxy, epoxy asphalt, asphalt, chlorinated rubber, chlorosulfonated polyethylene, polyvinyl chloride, perchloroethylene, urushiol resin, ethyl silicate, highly chlorinated polyethylene, polyurethane, polyurethane asphalt, phenolic, alkyd paint, etc. are classified according to resin.

In recent years, many modified resin anti-corrosion coatings with excellent performance have also emerged, such as alkyd resin modified polysulfide rubber modified epoxy waterproof anti-corrosion coatings and acrylic modified alkyd enamel used for railway passenger car boxes. At the same time, anti-corrosion coatings with China's own characteristics, such as urushiol titanium, urushiol epoxy, urushiol silicon heavy anti-corrosion coatings, etc. Since the 1990s, a new generation of anti-corrosion coating system has gradually occupied the mainstream of market research and application. Environmental friendly anti-corrosion coatings, such as water-based epoxy and water-based acrylic coatings, have emerged one after another, enriching the types of anti-corrosion coatings, and gradually developing towards multi-function.

2. Wide market demand and application scope

There are many manufacturers of anti-corrosion coatings in China. According to incomplete statistics, there are about 700, including nearly 100 manufacturers specializing in the production of anti-corrosion coatings, but the scale is not large. Only a few dozen have an annual output of more than 1000 tons. These production enterprises are mainly concentrated in coastal provinces and cities and central and southern regions of China. Due to the differences in the natural environment and development characteristics of various provinces and cities, the varieties and uses of anti-corrosion coatings are also different.

At present, anti-corrosion coatings in China are mainly used in chemical and petroleum industry, railway, highway and bridge, metallurgy industry, power and energy industry, machinery and textile industry, industrial product industry, automobile, ship and container industry. Among them, the industries with the largest demand are chemical and petroleum industries, including anti-corrosion of oil field facilities, oil pipelines, offshore platforms, steel structures and reinforced concrete structures of petrochemical plants; At the same time, the new construction and maintenance of railway and highway bridges are also the key fields for the application of anti-corrosion coatings. In addition, the industrial product field and marine anti-corrosion fields such as automobiles and ships are also the biggest demand points of the anti-corrosion coatings market.

3. Environmental friendly anticorrosive coatings attract much attention

At present, anti-corrosion coatings in China are advancing in the direction of high performance, high efficiency, low energy consumption and low pollution, and some water-based anti-corrosion coating manufacturers have used low pollution raw materials for production. Anti corrosion coating enterprises have eliminated various prohibited coating raw materials and replaced them with more environmentally friendly raw materials to achieve the goal of energy conservation, emission reduction and environmental friendliness.

It is believed that in the next few years, ship coatings, oil platform coatings, container coatings, chemical anti-corrosion coatings, railway, highway bridge, steel structure anti-corrosion coatings, and urban infrastructure coatings will remain the hot spots in the market. Domestic anti-corrosion coating enterprises should constantly strengthen their professional level, provide high-quality products and perfect services, so as to make greater efforts and contributions to the anti-corrosion market in China.

4. Rapid growth of marine anti-corrosion coatings

Now, the scale of marine development is expanding, and the sea crossing bridges, as the infrastructure of marine development, will continue to be built. These marine structures need a long anti-corrosion life, which will bring a huge market for marine anti-corrosion coatings. In addition, with the massive development of undersea oil fields, oil and gas pipelines will also appear one after another. In recent years, the construction of port infrastructure in China has been significantly accelerated, and the country is still actively planning and building offshore wind power, which has brought new development opportunities for the marine anti-corrosion coating market. At present, China's marine anti-corrosion coating manufacturers are moving towards the development of green, resource saving, high-performance anti-corrosion coatings. In the future, multifunctional anti-corrosion coatings with high temperature anti-corrosion, anti-static, high elasticity and non-toxic will also be developed. It is speculated by insiders that China's marine anti-corrosion coating market will grow at an annual rate of more than 30% driven by the shipbuilding and container manufacturing industry, the construction of cross sea bridges, offshore oil platforms and coastal ports.

2、 Analysis of the Problems in the Development of Anticorrosive Coatings

It is understood that the development level and coating performance of a country's heavy-duty anti-corrosion coatings are important indicators of a country's coating science and technology level. With the rapid development of transportation, energy, construction and other industries in China, the anti-corrosion coating industry in China has been further developed, but there are still some problems. For example, the large ship paint market is almost occupied by foreign manufacturers, and most of the container paint market is also almost occupied by foreign enterprises. There is still a certain gap between China's anti-corrosion coatings in terms of technical personality and product coating.

1. Large number and small scale of production enterprises

At present, there are many anti-corrosion coating manufacturers in China, about 700 according to incomplete statistics, including nearly 100 manufacturers specializing in the production of anti-corrosion coatings, but the scale is not large, and only a few dozen have an annual output of more than 1000 tons.

According to the 2012 ranking of Chinese anticorrosive paint enterprises released by China Business Information Network, only Shanghai International Paint Co., Ltd., COSCO Kansai Paint Chemical Co., Ltd., Guangzhou Zhujiang Chemical Co., Ltd. and Jiangsu Lanling Chemical Co., Ltd. are on the list. However, well-known enterprises in the field of industrial coatings, such as Changjiang Paint, Hangzhou Paint and Shuanghu Paint, did not have outstanding performance in anti-corrosion coatings.

The large number of production enterprises and small scale of the industry lead to low prices and unstable quality of anti-corrosion coatings, which weaken the profitability of the industry and lack of development potential.

2. Market standardization needs to be strengthened

At present, the coating standards for offshore platform anti-corrosion, railway bridges, vehicles, shipbuilding, ship repair and containerization industries and naval ships are relatively sound, while the industrial standards and supporting systems for wastewater treatment systems in petrochemical, electronic, food and other fields are still being formulated, and some markets have witnessed disorderly and irregular competition. For example, the industrial floor covers a wide range of industries and is difficult to standardize. Even if the national standard is formulated, it is difficult to cover its application fields, which is likely to lead to disorderly competition and hinder the normal development of the industry.

3. The paint application performance and painting process research need to be improved urgently

Proceeding from the concept of coating and coating integration, the anti-corrosion coating should pay attention to the coating construction performance, the adaptability to the treatment degree of different substrates, the adaptability to the construction methods and processes, the adaptability to the construction environment and other aspects to continuously optimize and improve the comprehensive performance of the product to meet the requirements of different corrosion environments. In particular, the coating process, surface treatment and supporting system in the maintenance or recoating process of equipment and facilities should be highly valued due to different corrosion and construction environment, different damage conditions of the original coating, and poor construction conditions.

4. Low industrial quality and competitiveness

In recent years, anti-corrosion coating companies are mainly private enterprises in Jiangsu, Henan and other places, and their employees are mainly migrant workers. Although their construction management level and personnel quality have made great progress in the past ten years, they still lack systematic training, which is difficult to ensure the demand of high-end market. The development of China's shipbuilding and heavy anti-corrosion industry requires a large number of high-quality project managers, technical representatives and construction personnel who meet the technical requirements. In the next few years, relevant industry organizations should assume the responsibility in this regard.

3、 Future Development Trend of Anticorrosive Coatings

With the development of infrastructure construction, industrial organization adjustment and emerging industries in China, anti-corrosion coatings have undoubtedly become an important field and branch in the coating industry and market system, and their related participating enterprises, technology development, product system, market scale, actual needs, application fields, and role play have reached a new level at present. Many industry experts believe that the manufacturing scale of industrial coatings is the most advanced High production efficiency and good production capacity belong to anti-corrosion coatings.

During the "Twelfth Five Year Plan" period, anti-corrosion coatings will enter the golden age of development and growth, and their scale, variety and performance will be greatly improved. At the same time, the scale of competition for anti-corrosion coatings will also be expanded, the competitive situation will become more obvious, and international cooperation will become increasingly important. According to relevant investigation and analysis, the development trend of anti-corrosion coatings in the future will mainly show the following aspects:

1. Waterborne anti-corrosion coating products are favored

With the enhancement of environmental protection awareness and the improvement of environmental protection laws and regulations, the application of traditional solvent based coatings is increasingly limited due to the volatile organic compounds VOC and harmful air pollutants HAP, and waterborne coatings are attracting more and more attention due to their environmental protection. Therefore, it is a general trend to develop and promote environmentally friendly water-based anti-corrosion coatings with VOC or even zero VOC.

As a water-based anti-corrosion primer, it is necessary to solve the problems of "flash corrosion" and poor water resistance of the substrate. At the same time, it is also necessary to study the overall supporting scheme and construction application of water-based anti-corrosion coatings. Through self-service research and development, the gap between China's water-based anti-corrosion coatings and some famous foreign companies is narrowing, and the prototype of water-based anti-corrosion coatings has been formed, and gradually realize industrialization.

2. Closer combination of coating technology and painting technology

Jiuzheng Building Materials believes that coating products are not final products, and only after coating or film is the final product required by users, so the development of coating technology and coating technology is inseparable and mutually reinforcing. Therefore, during the development of anti-corrosion coatings in the future, it is necessary to improve various properties of the coatings, including anti-corrosion performance, chemical resistance, adhesion to the substrate, long-term recoating performance, and construction free from seasonal restrictions, based on the basic performance of the coatings, according to the requirements for the protection life, construction convenience, adaptability to the four seasons and environmental friendliness of the steel structure anti-corrosion requirements, It has good constructability.

At the same time, the optimization of coating matching system also plays a very important role in coating, which is reflected in the coating specifications and acceptance standards of various industries. Up to now, China's coating specifications are not complete. In the future, the formulation and implementation of coating standards will be accelerated to promote the evening and optimization of the coating supporting system.

3. Pay attention to cleaner production

According to the definition of cleaner production by the United Nations Programme, cleaner production is a new creative idea, which continuously applies the environmental strategy of overall prevention to production processes, products and services to increase ecological efficiency and reduce human and environmental risks.

The ways to implement cleaner production mainly include: continuously improving technology, using clean energy and raw materials; Adopt advanced technology and equipment; Improve management; Comprehensive utilization; Improve resource utilization efficiency; Reduce pollution sources from the source; Reduce or avoid the generation of pollutants during production, service and product use. Clean production audit is a systematic procedure. Through the process of pollution prevention analysis and evaluation for enterprises, it is a process to find out the causes of high energy consumption and heavy pollution, and propose solutions.

The production enterprises of anticorrosive coatings must adhere to the guiding ideology of cleaner production to minimize the pollution sources and maximize the recycling of boredom; And strictly implement the national policies and regulations on environmental protection and occupational safety and health. According to the eye of environmental assessment, only by recycling waste liquid can enterprises have a foothold, enterprises have room for development, and products have room for survival.

4. More detailed market and products

With the continuous development of anti-corrosion coatings, the market positioning is focused on product refinement. It has become a necessary way for many industrial coatings to seek profits by specialized market segmentation coatings. Some professional anti-corrosion coatings are high threshold, such as ship antifouling coatings, which require high investment in time, technology, capital, inspection, cooperation, management, etc., and therefore high returns. Therefore, when positioning, enterprises need to combine their own characteristics, consider multiple aspects, focus on a certain field, and form their own characteristics to finally adapt to the changing market.

5. Attach importance to the research of production technology

The innovation of technology and products leads the enterprise to make continuous progress. In the process of technological innovation, product technological innovation can only become the core technology if it is accepted by customers after going out of the laboratory. In today's increasingly competitive environment, we must attach importance to the formulation technology of anti-corrosion coatings, as well as the production process and technical parameters, reduce energy consumption, reduce unit consumption, reduce pollutant emissions, and improve the competitiveness of our products. The research on the production technology of anti-corrosion coatings is a necessary means and measure to realize green chemical industry and low-carbon economy.

summary

In the continuous development of today's society, it is self-evident that anti-corrosion coatings have played an important role in China's industrial construction. Every national coating enterprise must face the problem of how to seize the market opportunity, use its own advantages, do a good job in the research and promotion of anti-corrosion coatings, and finally compete with foreign excellent enterprises. However, enterprises that focus on anti-corrosion coatings can only develop through continuous technological innovation, and can finally gallop the "dark horse" of anti-corrosion coatings for thousands of miles.