Slurry pump manufacturer accessories : pump selection should pay attention to what ? Resistance to crevice corrosion by the poor to good order is as follows : 12% Cr steels <17% Cr steel Stress corrosion Stress corrosion refers to a localized corrosion and corrosion under stress caused by environmental interaction . Austenitic CrNi steels are more prone to stress corrosion in Cl medium . With Cl content, temperature and stress more prone to stress corrosion . General The following 70 ~ 80 ℃ without stress corrosion slurry pump manufacturer. Measures to prevent stress corrosion is high Ni content (Ni> 25% ~ 30%) Cr ˉ Ni austenitic steel mouth Stainless steel slurry pump manufacturer.
Corrosion and wear Refers to the high-speed fluid on a metal surface erosion corrosion. Unlike abrasive fluid erosion corrosion and wear caused by the medium contains . Different materials have different corrosion and wear resistant . Abrasion resistance to corrosion by the difference between a good turn: ferritic austenitic – ferritic steel < austenitic steels .
Cavitation corrosion Cavitation occurs when the pump is called cavitation erosion caused by corrosion . Prevent cavitation corrosion of the most practical and simple method is cavitation . For frequently occur when operating the pump cavitation , in order to avoid cavitation corrosion, cavitation -resistant materials can be used , slurry pump manufacturer gold, phosphor bronze, stainless steel, 12% chromium steel. In fact, the corrosion damage is often the result of the combined effect of various types of corrosion , to consolidation selection factor. Second, the metal material of the pump and selection methods 1 Materials .`
There are many materials pump . Common metal materials are cast iron , cast steel , 12% chromium steels, austenitic stainless steel 316L stainless aluminum and so on. In addition there is a high silicon cast iron material for corrosive media , № Re ⒍ st, Monel , B, Hastelloy C, 904, CD4MCu, titanium , titanium alloy.
Common chemical composition of the alloy material is a common pump with auxiliary non-metallic materials: Teflon , nitrile rubber, chloroprene rubber, fluorine rubber, synthetic rubber, in addition FFKM , graphite, glass fiber filled PTFE and the like.
Post time: Jul-13-2021