A heat exchanger (also known as a heat exchanger or heat exchange equipment) is a device used to transfer heat from a hot fluid to a cold fluid to meet specified process requirements. It is an industrial application of convective heat transfer and heat conduction.

Heat transfer is a difficult task when dealing with corrosive media such as acids, chlorinated compounds and vaporizing fluids. Corrosion can lead to loss of mechanical integrity and fouling. Fouling deposits unwanted materials on surfaces. This changes the heat transfer coefficient of the equipment surfaces and affects the performance of the heat exchanger.

Material Corrosion:

For chemical, refining, and oil and gas-related process industries, corrosion of valves and equipment is a common problem.

According to general statistics of national defense, the military equipment and materials scrapped by the US military every year due to metal corrosion account for more than 5% of the total equipment, and metal corrosion will also cause a huge increase in the maintenance and protection costs of weapons and equipment. According to the U.S. Department of Defense, the U.S. Navy causes a huge loss of about $7 billion a year due to rust problems, of which $500 million is used to repair rusted Marine Corps ground vehicles.

The severity of corrosion:

Hou Baorong, Wang Jingquan and other academicians from the major consulting project of the Chinese Academy of Engineering conducted an industrial corrosion investigation "Our Corrosion Status and Control Strategy Research". The survey results show that in 2014, the loss caused by corrosion in my country reached 2.1 trillion yuan, accounting for about 3.34% of the GDP of that year. %.

According to a U.S. survey, the damage caused by corrosion can amount to as much as 6% of U.S. gross domestic product. At the same scale, worldwide, annual corrosion losses total more than $4 trillion.

Tantalum is recognized as the most corrosion-resistant metal. The surface alloy prepared by AINS gas-phase tantalum evaporation technology has the physical properties of tantalum metal, which can effectively improve the mechanical properties of the substrate, with excellent deformation and bending ability, unparalleled corrosion resistance, high temperature resistance, high pressure performance , is the best choice under severe working conditions.