, many users are concerned about whether the electromagnetic flowmeter they bought can work normally under the working conditions. Under the conditions of working conditions, selecting the correct electrode can improve the production efficiency. Here we summarize the commonly used electrode materials and their corrosion resistance. Now on the market more common electrode materials are:316L, Titanium, Platinum, Hastelloy B(HB), Hastelloy C(HC), Tungsten Carbideand so on. Here is a brief introduction for me:
316LSuitable for domestic water, industrial water, urban sewage and organic acids in the measurement of slightly corrosive media.
Titaniumresistance to seawater, all kinds of chloride and hypochlorite, oxidizing acid (including fuming nitric acid), organic acid, alkali and other corrosion, not resistance to pure reducing acid (such as sulfuric acid, hydrochloric acid) corrosion. However, if the acid contains oxidants (such as nitric acid, iron ions, copper ions), the corrosion resistance is greatly reduced.
Platinumis suitable for almost all acid, alkali, salt solution in addition to a variety of acid corrosion performance is very good.
Hastelloy Bhas good corrosion resistance to all concentrations of hydrochloric acid below the boiling point, also resistant to sulfuric acid, phosphoric acid, hydrofluoric acid, organic acid and other non oxidizing acid, alkali, non oxidizing salt corrosion.
Hastelloy Ccan resist the corrosion of oxidizing acid, such as nitric acid, mixed acid, or mixed medium of chromic acid and sulfuric acid, as well as the corrosion of oxidizing salts or other oxidants. Such as the corrosion of hypochlorite solution and seawater higher than normal temperature.
tungsten carbideGood wear resistance, can be used for the measurement of high wear media, such as pulp.