Chloride corrosion
Thread Content
Dear experts: What factors influence the rate of chloride ion corrosion? What is the difference between the corrosion of carbon steel and the corrosion of stainless steel? Which steel grades can effectively resist chloride ion corrosion? Does temperature have a significant impact on chloride corrosion? Please give me your guidance; thank you for participating!
I have experience; coatings applied with Teflon tend to peel off
It depends on the operating conditions. Based on the materials currently available, graphite offers better cost-performance, as its resistance to chloride ions is superior. Chemical equipment made of impermeable graphite can be used for a long time under the boiling conditions of gaseous hydrogen chloride or hydrochloric acid at any concentration without experiencing corrosion. Impervious graphite can be used to manufacture graphite heat exchangers, graphite heaters, graphite condensers, graphite falling film absorbers, graphite towers, graphite reactors, graphite hydrogen chloride synthesis furnaces, graphite pressure vessels (Class A4), various types of custom-made graphite equipment, and so on. It can also be used to create graphite pipes or steel-lined graphite pipes. Graphite-based chemical equipment is widely used in various industries such as chlor-alkali chemistry, metallurgy, pharmaceuticals, pesticides, environmental protection, and aerospace.
Corrosion is basically related to concentration and temperature (generally in a proportional manner). With carbon steel in contact with chloride ions, corrosion usually takes the form of uniform erosion, while with stainless steel, it tends to manifest as pitting corrosion. As for the effect of chloride ions, instead of using metals, non-metals such as lining tubes, FRP, PS, etc., can be used. Attention should be paid to the quality of these lining tubes...
What are the characteristics of chloride corrosion under strong alkaline conditions?