{"id":1345,"date":"2024-10-17T15:37:17","date_gmt":"2024-10-17T07:37:17","guid":{"rendered":"https:\/\/www.tflequip.com\/?p=1345"},"modified":"2024-11-08T15:20:24","modified_gmt":"2024-11-08T07:20:24","slug":"selection-guide-and-key-points-for-corrosion-resistant-magnetic-pumps","status":"publish","type":"post","link":"https:\/\/www.tflequip.com\/cs\/selection-guide-and-key-points-for-corrosion-resistant-magnetic-pumps\/","title":{"rendered":"Pr\u016fvodce v\u00fdb\u011brem a kl\u00ed\u010dov\u00e9 body pro korozivzdorn\u00e1 magnetick\u00e1 \u010derpadla"},"content":{"rendered":"

Magnetick\u00e1 \u010derpadla odoln\u00e1 proti korozi se vztahuj\u00ed na fluoroplastov\u00e1 magnetick\u00e1 \u010derpadla a nerezov\u00e1 magnetick\u00e1 \u010derpadla na b\u00e1zi fluoroplast\u016f a nerezov\u00e9 oceli. Nejprve si \u0159ekneme n\u011bco o pr\u016fvodci v\u00fdb\u011brem fluoroplastov\u00fdch magnetick\u00fdch \u010derpadel.<\/p>\n

Pr\u016fto\u010dn\u00e9 \u010d\u00e1sti fluoroplastov\u00e9ho magnetick\u00e9ho \u010derpadla jsou z materi\u00e1lu F46 a zb\u00fdvaj\u00edc\u00ed materi\u00e1ly zahrnuj\u00ed hlavn\u00ed h\u0159\u00eddel z karbidu k\u0159em\u00edku, statick\u00fd krou\u017eek t\u011blesa \u010derpadla, zadn\u00ed krou\u017eek ob\u011b\u017en\u00e9ho kola, kluzn\u00e9 lo\u017eisko a t\u011bsnic\u00ed krou\u017eek z fluorokau\u010duku pro ut\u011bsn\u011bn\u00ed.<\/p>\n

\"640\"<\/p>\n

Je zn\u00e1mo, \u017ee F46 odol\u00e1v\u00e1 korozi m\u00e9dia, ale materi\u00e1l karbidu k\u0159em\u00edku m\u00e1 toleran\u010dn\u00ed rozsah. S ohledem na ekonomick\u00e9 faktory je karbid k\u0159em\u00edku, kter\u00fd je standardn\u011b dod\u00e1v\u00e1n s fluoroplastov\u00fdm magnetick\u00fdm \u010derpadlem, reak\u010dn\u011b slinut\u00fd karbid k\u0159em\u00edku, jeho\u017e \u010distota je obecn\u011b 93% a\u017e 95% a zb\u00fdvaj\u00edc\u00edch 5% jsou p\u0159ev\u00e1\u017en\u011b krystaly oxidu k\u0159emi\u010dit\u00e9ho. Karbid k\u0159em\u00edku je velmi stabiln\u00ed i p\u0159i pokojov\u00e9 teplot\u011b, ale oxid k\u0159emi\u010dit\u00fd p\u0159i pokojov\u00e9 teplot\u011b reaguje s mnoha m\u00e9dii, jako je soda kaustick\u00e1, kyselina fluorovod\u00edkov\u00e1, fosfore\u010dnany atd. Rovnice chemick\u00e9 reakce je n\u00e1sleduj\u00edc\u00ed:<\/p>\n

Reakce kaustick\u00e9 sody a oxidu k\u0159emi\u010dit\u00e9ho: SiO2<\/sub>+2NaOH=Na2<\/sub>SiO3<\/sub>+H2<\/sub>O<\/p>\n

Reakce kyseliny fluorovod\u00edkov\u00e9 a oxidu k\u0159emi\u010dit\u00e9ho:6HF+SiO2<\/sub>=H2<\/sub>SiF6<\/sub>+2H2<\/sub>O<\/p>\n

V\u00fd\u0161e uveden\u00e1 reakce zni\u010d\u00ed hlavn\u00ed strukturu karbidu k\u0159em\u00edku, zv\u00fd\u0161\u00ed drsnost povrchu karbidu k\u0159em\u00edku, zm\u011bn\u00ed jej do matn\u00e9ho stavu a zrychl\u00ed rychlost opot\u0159eben\u00ed opot\u0159ebiteln\u00fdch d\u00edl\u016f. Proto je t\u0159eba p\u0159i v\u00fdb\u011bru materi\u00e1l\u016f studovat korozn\u00ed agresivitu dopravn\u00edho m\u00e9dia, jinak se \u017eivotnost korozivzdorn\u00e9ho magnetick\u00e9ho \u010derpadla zkr\u00e1t\u00ed.<\/p>\n

P\u0159i doprav\u011b m\u00e9di\u00ed, jako je kyselina dusi\u010dn\u00e1 a organick\u00e1 rozpou\u0161t\u011bdla, nelze zvolit t\u011bsnic\u00ed krou\u017eky z fluorov\u00e9 pry\u017ee a m\u011bly by se pou\u017e\u00edvat t\u011bsnic\u00ed krou\u017eky s fluorov\u00fdm povlakem, proto\u017ee t\u011bsnic\u00ed krou\u017eky z fluorov\u00e9 pry\u017ee v kyselin\u011b dusi\u010dn\u00e9 a organick\u00fdch rozpou\u0161t\u011bdlech bobtnaj\u00ed a ztr\u00e1cej\u00ed pru\u017enost, co\u017e ovliv\u0148uje t\u011bsnic\u00ed vlastnosti.<\/p>\n

P\u0159edstavme si body v\u00fdb\u011bru magnetick\u00fdch \u010derpadel na b\u00e1zi nerezov\u00e9 oceli v magnetick\u00fdch \u010derpadlech odoln\u00fdch proti korozi.<\/p>\n

Magnetick\u00e1 \u010derpadla z nerezov\u00e9 oceli jsou zalo\u017eena p\u0159edev\u0161\u00edm na austenitick\u00e9 nerezov\u00e9 oceli. Magnetick\u00e1 \u010derpadla z austenitick\u00e9 nerezov\u00e9 oceli maj\u00ed n\u00edzkou odolnost proti korozi v kysel\u00fdch m\u00e9di\u00edch, ale jsou inertn\u00ed v alkalick\u00fdch korozivn\u00edch m\u00e9di\u00edch. Proto se v roztoc\u00edch obsahuj\u00edc\u00edch alkalick\u00e1 m\u00e9dia obvykle vol\u00ed korozivzdorn\u00e1 magnetick\u00e1 \u010derpadla z nerezov\u00e9 oceli.<\/p>\n

\"1\"<\/p>\n

Krom\u011b austenitick\u00e9 korozivzdorn\u00e9 oceli pr\u016fto\u010dn\u00fdch \u010d\u00e1st\u00ed jsou zb\u00fdvaj\u00edc\u00edmi materi\u00e1ly pono\u0159en\u00fdmi do m\u00e9dia: SIC, cementovan\u00fd karbid wolframu, austenitick\u00e1 nerezov\u00e1 ocel po iontov\u00e9 nitridaci a t\u011bsn\u011bn\u00ed z PTFE.<\/p>\n

Reakce karbidu k\u0159em\u00edku v alkalick\u00e9m roztoku prob\u00edh\u00e1, jak je uvedeno v\u00fd\u0161e. Cementovan\u00fd karbid wolframu, iontov\u011b nitridovan\u00e1 nerezov\u00e1 ocel atd. jsou v alkalick\u00e9m roztoku inertn\u00ed. Proto se p\u0159i doprav\u011b louhu sodn\u00e9ho a jin\u00fdch m\u00e9di\u00ed obvykle vol\u00ed opot\u0159ebiteln\u00e9 d\u00edly z cementovan\u00e9ho karbidu wolframu.<\/p>","protected":false},"excerpt":{"rendered":"

Corrosion-resistant magnetic pumps refer to fluoroplastic magnetic pumps and stainless steel magnetic pumps based on fluoroplastics and stainless steel. Let’s first talk about the selection guide for fluoroplastic magnetic pumps. The flow-through parts of the fluoroplastic magnetic pump are F46, and the remaining materials include the main shaft of silicon carbide, the pump body static […]<\/p>","protected":false},"author":4,"featured_media":1358,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[36],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/posts\/1345"}],"collection":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/comments?post=1345"}],"version-history":[{"count":0,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/posts\/1345\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/media\/1358"}],"wp:attachment":[{"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/media?parent=1345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/categories?post=1345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tflequip.com\/cs\/wp-json\/wp\/v2\/tags?post=1345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}