Ndeipi corrosive media inogona kumira ne-anti-corrosion simbi isina magineti pombi?

Stainless simbi yemagineti pombi ine anti-corrosion performance. Stainless simbi zvinhu zvinosanganisira 304, 316L, etc. Zvinhu zviviri izvi zvinowanzoshandiswa musimbi isina tsvina yemagineti pombi. Pakuendeswa kwezvinwiwa zvine corrosion yakasimba, kupi kugumira kweanti-corrosion performance yesimbi isina tsvina? Iyo yepakati inofanira kutakurwa Pane marudzi masere makuru ekuora pasimbi yemagineti pombi zvinhu: electrochemical corrosion, uniform corrosion, intergranular corrosion, pitting corrosion, crevice corrosion, stress corrosion, wear corrosion, uye cavitation corrosion.

1. Gomba ngura
Pitting corrosion imhando yekuora kwenzvimbo. Nekuda kwekuparadzwa kwenzvimbo kwesimbi passivation firimu, hemispherical pits inokurumidza kuumbwa mune imwe nzvimbo yenzvimbo yesimbi, iyo inonzi pitting corrosion. Pitting corrosion inonyanya kukonzerwa neCL￣. Kudzivirira gomba, Mo-ine simbi (kazhinji 2.5% Mo) inogona kushandiswa, uye nekuwedzera kweCL￣ zvemukati uye tembiricha, izvo zveMo zvinofanirawo kuwedzera zvinoenderana.

2. Crevice corrosion
Crevice corrosion imhando yekuora kwenzvimbo, iyo inoreva kukora kunokonzerwa nekuparadzwa kwenzvimbo kwesimbi passivation firimu nekuda kwekudzikira kweokisijeni yemukati uye (kana) pH kuderera mugomba mushure mekunge mutswe wazadzwa nemvura inoparadza. Stainless steel crevice corrosion inowanzoitika muCL￣ solution. Crevice corrosion uye pitting corrosion zvakafanana zvakanyanya mumagadzirirwo avo ekugadzira. Ose ari maviri anokonzerwa nebasa reCL￣ uye kuparadzwa kwenzvimbo kweiyo passivation firimu. Nekuwedzera kweCL ￣ zvemukati uye kukwira kwekushisa, mukana weiyo crevice corrosion inowedzera. Kushandiswa kwesimbi ine yakakwira Cr uye Mo zvemukati zvinogona kudzivirira kana kuderedza kukoromoka.

3. Kuora kwakafanana
Uniform corrosion (Uniform corrosion) zvinoreva kukora kwemakemikari kwesimbi yese kana chinhu chinoparadza chabata pamusoro pesimbi. Iyi ndiyo nzira inonyanyozivikanwa uye isingakuvadzi yecorrosion.
Matanho ekudzivirira ngura yunifomu ndeaya: tora zvinhu zvakakodzera (kusanganisira zvisiri zvesimbi), uye funga yakakwana mvumo yekuora mukugadzira pombi.

4. Cavitation corrosion
Kuora kunokonzerwa ne cavitation mune magnetic pump inonzi cavitation corrosion. Iyo inonyanya kushanda uye yakapusa nzira yekudzivirira cavitation corrosion ndeye kudzivirira cavitation kuti irege kuitika. Pamapombi anowanzo kutambura necavitation panguva yekushanda, kuitira kudzivirira cavitation corrosion, cavitation-resistant zvinhu zvinogona kushandiswa, senge hard alloy, phosphor bronze, austenitic Stainless simbi, 12% chromium simbi, nezvimwe.

5. Stress ngura
Stress corrosion inoreva rudzi rwekuora kwenzvimbo kunokonzerwa nekubatana kwekuita kwekushushikana uye nharaunda inoora.
Austenitic Cr-Ni simbi inonyanya kukonzeresa corrosion muCL ~ yepakati. Nekuwedzera kweCL ￣ zvemukati, tembiricha uye kushushikana, kushushikana kwecorrosion kunowanzoitika. Kazhinji, kuora kwekushushikana hakuitike pasi pe70 ~ 80 ° C. Chiyero chekudzivirira kushushikana kwekuora mwoyo ndechekushandisa austenitic Cr-Ni simbi ine yakakwira Ni content (Ni is 25% ~ 30%).

6. Electrochemical ngura
Electrochemical corrosion (Electrochemical corrosion) zvinoreva magadzirirwo emagetsi emagetsi apo panosangana simbi dzakasiyana-siyana inoumba bhatiri nekuda kwekusiyana kwemagetsi emagetsi pakati pesimbi, zvichikonzera kuparara kwesimbi yeanode.
Matanho ekudzivirira electrochemical corrosion: Kutanga, zviri nani kushandisa simbi imwechete yesimbi yekuyerera chiteshi chepombi; chechipiri, shandisa chibayiro anodes kudzivirira cathode simbi.

7. Intergranular corrosion
Intergranular corrosion imhando yekuora kwenzvimbo, iyo inonyanya kureva kunaya kwechromium carbide pakati pezviyo zvesimbi isina tsvina. Intergranular corrosion inokanganisa zvakanyanya kune simbi isina tsvina. Izvo zvinhu zvine intergranular corrosion inorasikirwa nesimba rayo uye plastiki inenge yakazara.
Matanho ekudzivirira kuparara kwe intergranular ndeaya: annealing stainless steel, kana kushandisa ultra-low carbon stainless steel (C<0.03%).

8. Kupfeka nekuora
Abrasion corrosion zvinoreva rudzi rwekukurwa kwemvura inomhanya-mhanya pamusoro pesimbi. Kukukurwa kwemvura kwakasiyana nekukukurwa kunokonzerwa nezvidimbu zvakasimba mukati.
Zvigadzirwa zvakasiyana zvine anti-kupfeka uye corrosion zvinhu zvakasiyana. Kurongeka kwekupfeka uye kushora kuramba kubva pakuipa kuenda kune yakanaka ndeiyi: ferritic Cr simbi