We know that the chloride ion in industrial water is a kind of ion which can make metal corrosion, it is mainly manifested in the comprehensive corrosion of carbon steel and corrosion of stainless steel and stress corrosion. Stainless steel valves in a variety of industrial cooling water use, with comprehensive and very low corrosion rate, but in the actual industrial production conditions, stainless steel equipment, especially a variety of industrial water cooler, corrosion damage accident is very serious and the corrosion damage is ruptured by the localized corrosion (mainly cavitation corrosion and stress corrosion) caused.
With the increasing shortage of water resources, making proper use of water and improve water recycling rate is around the corner, the chlorine ion in circulating cooling water maximum allowable quantity and concentration ratio and operating conditions are closely related. The important reason of our country some large petrochemical enterprises concentration multiple of circulating water is not high is limited by the concentration of chloride ion.
So we must accelerate the step on the corrosion behavior of metals in chloride solution, the development of resistant chloride ion corrosion inhibitor, improve concentration multiple of circulating water, energy saving and water saving.
