Yeyiphi imithombo yeendaba edlayo enokumelana nempompo yentsimbi engatyiwa ngumhlwa?

Impompo yemagnethi yensimbi engenasici ine-anti-corrosion performance. Izinto zensimbi ezingenasici ziquka i-304, i-316L, njl. Ezi zinto zimbini zisetyenziswa ngokuqhelekileyo kwiimpompo zemagnethi zensimbi ezingenasici. Ukuhanjiswa kolwelo oluluqilima oluluqilima, uphi umda wokusebenza kwe-anti-corrosion yensimbi engenasici? Isixhobo esiphakathi esizakuthuthwa Kukho iintlobo ezisibhozo eziphambili zomhlwa kwizinto zempompo zemagneti: ukubola kwe-electrochemical, i-uniform corrosion, i-intergranular corrosion, i-pitting corrosion, i-crevice corrosion, i-corrosion yoxinzelelo, i-corrosion yokunxiba, kunye ne-cavitation corrosion.

1. Ukugalela umhlwa
I-Pitting corrosion luhlobo lwe-corrosion yendawo. Ngenxa yokutshatyalaliswa kwendawo yefilimu ye-metal passivation, imigodi ye-hemispherical yenziwa ngokukhawuleza kwindawo ethile yendawo yentsimbi, ebizwa ngokuba yi-pitting corrosion. Ukonakala komngxuma kubangelwa ikakhulu yi-CL￣. Ukuthintela i-corrosion ye-pitting, i-Mo-containing steel (ngokuqhelekileyo i-2.5% Mo) ingasetyenziselwa, kwaye ngokunyuka kwe-CL￣ umxholo kunye nobushushu, umxholo we-Mo kufuneka ukwandise ngokufanelekileyo.

2. Umhlwa kwimingxuma
I-Crevice corrosion luhlobo lwe-corrosion yendawo, ebhekiselele kwi-corrosion ebangelwa ukutshatyalaliswa kwendawo yefilimu ye-metal passivation ngenxa yokuncipha komxholo we-oksijini kunye (okanye) ukuncipha kwe-pH kwimingxuma emva kokuba intaka izaliswe lulwelo oludlayo. Intsimbi engenastainless crevice corrosion idla ngokuvela kwi CL￣ solution. I-Crevice corrosion kunye ne-pitting corrosion ifana kakhulu kwindlela yokwakheka kwayo. Zombini zibangelwa yindima ye-CL￣ kunye nokutshatyalaliswa kwendawo yefilimu ye-passivation. Ngokunyuka komxholo we-CL￣ kunye nokunyuka kwamaqondo obushushu, amathuba okuba ne-corrosion yemingxuma iyanda. Ukusetyenziswa kwesinyithi kunye nomxholo ophezulu we-Cr kunye ne-Mo kunokuthintela okanye ukunciphisa i-corrosion.

3. Umhlwa olinganayo
Umhlwa olinganayo ubhekisa kumhlwa wekhemikhali ofanayo wawo wonke umphezulu wesinyithi xa ulwelo oludlekayo ludibana nomphezulu wesinyithi. Le yeyona ndlela ixhaphakileyo kwaye incinci yobungozi bomhlwa.
Amanyathelo okuthintela ukubola okufanayo zezi: ukwamkela izinto ezifanelekileyo (kubandakanywa nezingezo zetsimbi), kwaye uqwalasele isibonelelo esaneleyo somhlwa kuyilo lwempompo.

4. Ukonakala kweCavitation
I-corrosion ebangelwa yi-cavitation kwipompo yamagnetic ibizwa ngokuba yi-cavitation corrosion. Eyona ndlela isebenzayo kunye nelula yokukhusela i-cavitation corrosion kukuthintela ukuba i-cavitation ingenzeki. Kwiimpompo ezihlala zihlupheka ngenxa ye-cavitation ngexesha lokusebenza, ukwenzela ukuba ugweme i-cavitation corrosion, i-cavitation-resistant materials ingasetyenziswa, njenge-alloy eqinile, i-phosphor bronze, i-austenitic stainless steel, i-12% ye-chromium steel, njl.

5. Uxinzelelo lwe-corrosion
Uxinzelelo lwe-corrosion lubhekisa kuhlobo lwe-corrosion yendawo ebangelwa sisenzo esidibeneyo soxinzelelo kunye nemekobume eyonakalisayo.
Intsimbi ye-Austenitic Cr-Ni ithandeka ngakumbi kuxinzelelo lwe-corrosion kwi-CL ~ medium. Ngokunyuka komxholo we-CL￣, ubushushu kunye noxinzelelo, ukubola koxinzelelo kunokwenzeka ukuba kwenzeke. Ngokuqhelekileyo, ukubola koxinzelelo akwenzeki ngaphantsi kwe-70 ~ 80 ° C. Umlinganiselo wokuthintela i-corrosion yoxinzelelo kukusebenzisa i-austenitic Cr-Ni intsimbi enomxholo ophezulu we-Ni (Ni yi-25% ~ 30%).

6. Ukubola kwe-Electrochemical
I-electrochemical corrosion ibhekiselele kwinkqubo ye-electrochemical apho umphezulu wokudibanisa wesinyithi esahlukileyo ubumba ibhetri ngenxa yomahluko kumandla ombane we-electrode phakathi kweentsimbi, nto leyo ebangela ukuhlwa kwentsimbi ye-anode.
Amanyathelo okuthintela ukubola kwe-electrochemical: Okokuqala, kungcono ukusebenzisa izinto zetsimbi ezifanayo kumjelo wokuhamba wempompo; okwesibini, sebenzisa i-anodes yedini ukukhusela isinyithi se-cathode.

7. I-Intergranular Corrosion
I-Intergranular corrosion luhlobo lwe-corrosion yendawo, eyona nto ibhekiselele kwimvula ye-chromium carbide phakathi kweenkozo zensimbi ezingenasici. I-Intergranular corrosion idla ngokugqithisileyo kwimathiriyeli yentsimbi engenasici. Izinto eziphathekayo kunye ne-intergranular corrosion ilahlekelwa amandla ayo kunye neplastiki phantse ngokupheleleyo.
Imilinganiselo yokukhusela i-intergranular corrosion yile: i-annealing stainless steel, okanye ukusebenzisa i-ultra-low carbon stainless steel (C <0.03%).

8. Ukunxiba kunye nomhlwa
I-abrasion corrosion ibhekiselele kuhlobo lokhukuliseko lolwelo olunesantya esiphezulu kumphezulu wesinyithi. Ukhukuliseko lolwelo lwahlukile kukhukuliseko olubangelwa ngamasuntswana aqinileyo phakathi.
Izixhobo ezahlukeneyo zineempawu ezahlukeneyo zokuchasa kunye ne-corrosion. Umyalelo wokuguga kunye nokumelana nomhlwa ukusuka ekuhluphekeni ukuya kokulungileyo kukuba: intsimbi ye-ferritic Cr