Development and Application of New Type Wear Resistant Anticorrosion Coatings

HR heavy anti-corrosion wear-resistant anti-corrosion coating is a two-component coating that can be cured at room temperature using epoxy resin as a film-forming substance and ceramic powder as a wear-resistant filler. The coating has the characteristics of wear resistance, corrosion resistance, comprehensive physical and mechanical properties, and convenient construction. The paper focuses on the film forming mechanism, experiment and application of ceramic coatings.

The corrosion of petroleum metal pipelines has brought huge losses to the construction of the petrochemical industry. The petrochemical industry has invested huge amounts of money every year in anticorrosion work for metal pipelines. Anticorrosion in pipelines has always been an important task in the production and construction of the petrochemical industry. At present, domestic pipeline internal corrosion is mainly stainless steel. Lining, epoxy powder, nano titanium and other technologies. HR new wear-resistant anti-corrosion coating was developed in cooperation with Hairui Petroleum. It is mainly used in various anti-corrosion anti-corrosion coatings for pipelines. It solves the lining shedding phenomenon of stainless steel lining pipes in use and fills in the use of ceramic coatings in China. The technical gap for anticorrosion within the pipeline.

The main mechanism of 1HR wear-resistant ceramic anti-corrosion coating

HR wear-resistant ceramic anti-corrosion coating uses submicron ceramic particles as filler. It is a wear-resistant and anti-corrosive coating that can protect the surface of most metal pipes and is divided into two components, A and B. The A component is a mixture of ceramic powder, epoxy resin, and volatile organic compounds, and the B component is a curing agent. When the configured HR wear-resistant anticorrosive paint is sprayed on the surface of the workpiece that has been subjected to the surface pretreatment by the high-pressure air spraying equipment, the paint will gradually solidify at room temperature and then bond with the base body to have a high hardness, wear resistance, corrosion resistance, Ceramic coating that resists high temperature oxidation and other advantages. The paint can be sprayed, brushed or rolled at room temperature, and the operation is very simple. The coating can be used on the wall of oil and gas wells containing large amounts of CO2, H2S, and salt water, which can greatly increase the service life of the pipeline.

HR wear-resisting ceramic anti-corrosion coating is based on epoxy resin and is made of soft ceramic powder and other wear-resistant pigments. It is a two-component, high wear-resistant ceramic anticorrosion coating, in which the main ceramic components are A, B and C. (A, B, C - specific types of ceramic powder code) ceramic A component is a white loose crystalline powder, the average size of the powder particles is 40 ~ 70μm, each particle is composed of a number of small crystals smaller than 0.1μm , is a porous spherical focusing body, each particle may contain a plurality of small crystals. The porosity within the particles is 25% to 30% of the entire volume. This porous structure is not conducive to the mutual contact of the A crystals.

The microstructure of a certain number of ceramic B-composite micron-sized A ceramics has undergone major changes, the crystal size of the composites has decreased significantly, and the phenomenon of abnormal growth of the main crystals of the A-ceramics has been overcome. Crystalline fractures coexist. In addition to the nano-particles distributed in the grain boundary of the main crystalline phase, some of them are distributed on the transcrystalline fracture surface of the main crystalline phase. B has a low coefficient of expansion, high hardness and high thermal conductivity. Adding A can improve the thermal shock resistance of the ceramic and improve its toughness.