Research on high water-containing anti-corrosion coating technology of petroleum machinery

With the development of petroleum industry, most of China's oil fields have entered a stage of medium- and high-water development. In the course of this stage of development, the degree of corrosion of petroleum machinery is increasing day by day, coupled with the sulfuric acidity of most of China's oil is relatively high, by the combined impact of these factors, the corrosion of petroleum machinery is becoming more and more serious, which has a serious impact on oil production, and led to various accidents in oil production. This paper will analyze the causes of corrosion of petroleum machinery, and then explore the effective measures to prevent corrosion of petroleum machinery, so as to provide a basic guarantee for the development of the petroleum industry.
with the rapid development of the petroleum industry, the technology to prevent and control the corrosion of petroleum machinery has gradually become an important factor restricting the development of the petroleum industry. Zhisheng Weihua anti-corrosion coating engineers for a long time for the development of the oil industry, good anti-corrosion technology of petroleum machinery is the guarantee of the development of the oil industry, not only to improve the daily production of oil, but also to extend the life of petroleum machinery. In addition, it can save the cost of oil enterprise development and maximize the economic benefits of oil enterprises. Therefore, oil enterprises should strengthen the development and innovation of oil machinery corrosion technology, for the development of the oil industry to provide a strong guarantee.
I. Causes of oil machinery corrosion
1, oil polysulphides lead to corrosion of petroleum machinery
Most of China's oil contains more polysulphides, in the oil extraction process, petroleum machinery and equipment when exposed to oil is prone to oil polysulphides corrosion, and then produce a variety of polysulphides on the surface of petroleum machinery, in the process of oil machinery operation, these polysulphies will bring a lot of instability factors to oil machinery. In addition, long-term exposure of machinery and equipment to the air, carbon dioxide and moisture in the air will react with the corrosive parts of the machinery, resulting in the corrosion of the entire petroleum machinery and equipment more serious.
2, oil sulphides lead to corrosion of petroleum machinery
this corrosion phenomenon is mainly caused by impurities in petroleum products, the main components of these impurities are sulphides. Sulphides can react with water in petroleum, resulting in the production of large quantities of hydrogen sulfide in petroleum, hydrogen sulfide is reductive and acidic, which causes serious corrosion of petroleum machinery and equipment. In addition, there are a large number of chemical impurities in oil, which also contributed to a large extent to the corrosion of petroleum machinery and equipment.
3, chloride in petroleum causes corrosion of petroleum machinery
According to the investigation, many oil now contains a large amount of salt water, if the chemical hydrolytic phenomenon of salt water, it will be transformed into hydrochloric acid, for petroleum machinery, hydrochloric acid is one of the key factors leading to corrosion of petroleum machinery and equipment, causing serious corrosion of petroleum machinery and equipment, thereby reducing the quality and safety of petroleum machinery and equipment.
4, petroleum cyclane acid lead to corrosion of petroleum machinery and equipment
cyclane acid is now the main component of organic acid in petroleum, cyclane acid has a strong chemical properties, can be used in cooperation with iron in petroleum machinery, so that the iron in petroleum machinery is seriously corroded, thereby greatly reducing the safety, reliability and quality of petroleum machinery and equipment, and ultimately the production of petroleum production restrictions.
, petroleum machinery anti-corrosion technical measures
1, the use of efficient anti-corrosion coatings
to prevent corrosion of petroleum machinery, should use efficient anti-corrosion coatings. For example, anti-corrosion coatings with environmentally resistant acid properties and anti-corrosion coatings of inorgic polymer properties, etc., these anti-corrosion coatings can play a role in the corrosive impurities and acids in petroleum, to a large extent, the corrosion of petroleum machinery plays a good role in preventing and control. First of all, anti-corrosion coatings with environmentally resistant acid properties, the main anti-corrosion principle of this coating is to petroleum crude oil can cause corrosion of petroleum machinery organic acids, hydrochloric acid and hydrogen sulfide and other acidic organic matter or acidic compounds to reduce. Secondly, inorganic polymer nature of anti-corrosion coatings, this coating can be anti-corrosion of petroleum machinery, the principle is mainly to the oil dispersed metals and metal oxides to prevent and control, so as to achieve anti-corrosion purposes.
Beijing Zhisheng Weihua Chemical Co. , Ltd. Joint Force Research Institute jointly developed, mainly to deal with the military war equipment high anti-corrosion demand and research and development of ZS-711 inorganic anti-corrosion coatings, the main function is acid-resistant alkali such as chloride, sulphides and organic acids, anti-electrochemical corrosion, that is, anti-static corrosion, wide application conditions, high coating hardness.
ZS-711 inorganic anti-corrosion coating using the world's latest anti-corrosion research and development technology, the solution is made by the new Chisheng Weihua special inorganic polymer chelate membrane solution, based on sioxy-Si-O-Si-key, grafting organic alkyl side chain as a supplement Then to OH as the end chain chelation of anti-corrosion film, the bond on the silicon atoms connected to chelate, alkyl has a very good triple synergy effect, solution stability is strong, reduce the impact on the internal high concentration, film is denser, strong adhesion, high temperature resistance. The successful research and development of chelated anti-corrosion coating film solution, avoiding the traditional anti-corrosion coating low, medium and cumbersome construction process, paint single coating, according to different operating conditions, brush 2 times or more than 2 times can be.
ZS-711 inorganic anti-corrosion paint is a highly dispersed and active passivated metal particles, nano graphite scales, nanometal sex oxides, ultra-fine rare earth ultra-micro-powder, etc. After the biochemical pigment, in the corrosion is able to play the role of corrosion-resistant to enhance polarization, acid-resistant alkali resistance to high corrosion, play a good role in neutralizing and preventing the substrate impromination, but also to avoid the presence of coating pinholes, coating hardness, wear-resistant impact, acid-base aging time.
Coating coating formed by inormeric polymer chelate synthetic membrane solution and highly active anti-corrosion pigments can be combined with the rapid reaction of atoms or ions on the surface material of the object, resulting in a physical, chemical, electronic triple protection protection effect, through chemical bonds, ion bonds and the substation surface firmly combined. For physical anti-corrosion, chemical anti-corrosion, electronic anti-corrosion has a good protective substation effect. Coatings are non-polluting to the environment, long service life, anti-corrosion performance exceeds the international advanced level, is in line with environmental protection requirements of high-tech replacement products.
2. The use of new anti-corrosion materials in the manufacture of petroleum machinery and equipment
in the process of manufacturing petroleum machinery, some new materials with stronger, higher and more complete anti-corrosion properties can be used to solve the corrosion of petroleum machinery from the source. Zhisheng Weihua inorganic anti-corrosion coating in the selection of petroleum machinery manufacturing materials, should be scientific and reasonable choice of oxidation, anti-reducing and acid-resistant oil machinery manufacturing materials, so as to provide higher safety, higher quality and more reliable materials for the manufacture of petroleum machinery and equipment, thereby improving the anti-corrosion performance of petroleum machinery equipment, solve the corrosion problem of petroleum machinery, and ultimately ensure the smooth completion of oil production.
3, the use of electrochemical corrosion
so-called electrochemical corrosion is the use of electric current to slow down the corrosion of machinery. The anti-corrosion principle of this method is the movement of electrons during corrosion. Before the cathode protection of the electric flow, corrosion is achieved at the corrosion site of the machinery by sacrificing the cathode filler pack. If enough electrons pass through the metal surface of a machine, the corrosion of the machine slows down or stops. Today's electrochemical anti-corrosion methods in different anti-corrosion objects will take different technical combination methods, the main is electrochemical and external coating combination methods.
4, in the oil corrosion environment to add corrosion inhibitors
In the process of oil work, construction workers in the oil corrosion environment to add appropriate corrosion inhibitors, so that the material in the mechanical metal surface chemical and material force, thereby slowing the speed of metal dissolution, play a role in corrosion. The use of corrosion inhibitors can not only protect petroleum machinery and equipment from the corrosion of various chemicals, but also save a lot of costs and costs for the development of petroleum enterprises.
, corrosion inhibitors have been widely used in the oil industry. Zhisheng Weihua's ZS-711 inorgable antiseptic coating is effective in preventing corrosion of corrosion inhibitors.
5. The main principle of anti-corrosion of petroleum machinery using electroplating tungsten alloy and pipe hoops
is the electroplating method in physics, which places metals with isolation and corrosion protection on the surface of petroleum machinery equipment, thereby reducing the degree of corrosion of petroleum machinery. This method can achieve anti-corrosion effect by reducing the contact area of oil and equipment to a large extent. In addition, the scientific and rational use of the pipe hoops of petroleum machinery and equipment can also effectively reduce the corrosion of petroleum machinery.
, the corrosion problem of petroleum machinery has become more and more serious, so all kinds of effective measures and means should be taken to strengthen the anti-corrosion work of petroleum equipment. Although the current anti-corrosion of petroleum machinery and equipment has achieved some results, but still need to continue to explore and innovate, so that ZS-711 inororable anti-corrosion coatings in new technologies and new materials to make continuous breakthroughs, only in this way, in order to provide more help for China's oil machinery anti-corrosion work.