Kedu ihe mgbasa ozi na-emebi emebi nwere ike ịgbapu igwe anaghị agba nchara mgbochi corrosion?

Igwe igwe anaghị agba nchara magnetik nwere mgbochi corrosion arụmọrụ. Ihe igwe anaghị agba nchara gụnyere 304, 316L, wdg. A na-ejikarị ihe abụọ a eme ihe na nfuli igwe anaghị agba nchara. Maka nnyefe nke mmiri mmiri na-emebi emebi siri ike, olee ebe njedebe nke arụmọrụ mgbochi nke igwe anaghị agba nchara? Ndị na-ajụ ihe a ga-ebufe E nwere ụdị isi asatọ nke corrosion na metal magnetik mgbapụta ihe: electrochemical corrosion, uniform corrosion, intergranular corrosion, pitting corrosion, crevice corrosion, stress corrosion, wear corrosion, and cavitation corrosion.

1. Pitting corrosion
Pitting corrosion bụ ụdị corrosion mpaghara. N'ihi mbibi mpaghara nke ihe nkiri passivation metal, olulu hemispherical na-etolite ngwa ngwa n'otu mpaghara mpaghara nke elu igwe, nke a na-akpọ pitting corrosion. Ọ bụ CL￣ na-ebute ọnyà pitting. Iji gbochie corrosion nke pitting, enwere ike iji igwe nwere Mo-nwere (na-abụkarị 2.5% Mo), yana mmụba nke ọdịnaya CL￣ na ọnọdụ okpomọkụ, ọdịnaya Mo kwesịrị ịbawanye ya.

2. Crevice corrosion
Crevice corrosion bụ ụdị corrosion mpaghara, nke na-ezo aka na nrụrụ aka nke mbibi mpaghara nke ihe nkiri passivation metal n'ihi mbelata nke ikuku oxygen na (ma ọ bụ) pH mbelata na crevice mgbe crevice jupụtara na mmiri mmiri na-emebi emebi. Igwe anaghị agba nchara nchara corrosion na-emekarị na ngwọta CL￣. Crevice corrosion na pitting corrosion yiri nnọọ na usoro nhazi ha. A na-akpata ha abụọ site na ọrụ CL￣ na mbibi mpaghara nke ihe nkiri passivation. Site na mmụba nke ọdịnaya CL￣ na ịrị elu nke okpomọkụ, ohere nke corrosion crevice na-abawanye. Iji ọla nwere ọdịnaya Cr na Mo dị elu nwere ike igbochi ma ọ bụ belata corrosion crevice.

3. Uniform corrosion
Nrụrụ n'ụdị na-ezo aka na corrosion kemịkalụ otu nke elu igwe dum mgbe mmiri mmiri na-emebi emebi na-akpakọrịta n'elu igwe. Nke a bụ ụdị corrosion kacha ewu ewu na nke kachasị emerụ ahụ.
Usoro iji gbochie corrosion otu bụ: were ihe ndị dabara adaba (gụnyere ndị na-abụghị ọla), ma tụlee ikike nrụrụ zuru oke na imepụta mgbapụta.

4. Cavitation corrosion
A na-akpọ corrosion nke cavitation na mgbapụta magnetik kpatara. Ụzọ kachasị dị irè ma dị mfe iji gbochie cavitation corrosion bụ igbochi cavitation ime. Maka nfuli nke na-enwekarị nsogbu na cavitation n'oge arụ ọrụ, iji zere cavitation corrosion, a pụrụ iji ihe ndị na-eguzogide cavitation mee ihe, dị ka alloy siri ike, bronze phosphor, austenitic igwe anaghị agba nchara, 12% chromium ígwè, wdg.

5. Nchegbu corrosion
Nchegbu corrosion na-ezo aka n'ụdị corrosion nke mpaghara na-akpata site na njikọta nke nrụgide na gburugburu ebe obibi.
Austenitic Cr-Ni ígwè na-adịkarị mfe na corrosion nrụgide na CL ~ ọkara. Site na mmụba nke ọdịnaya CL￣, okpomọkụ na nrụgide, corrosion nrụgide nwere ike ime. N'ozuzu, corrosion nrụgide adịghị eme n'okpuru 70 ~ 80 Celsius. Ihe iji gbochie nrụrụ nrụgide bụ iji austenitic Cr-Ni steel nwere ọdịnaya Ni dị elu (Ni bụ 25% ~ 30%).

6. Electrochemical corrosion
Electrochemical corrosion na-ezo aka na usoro electrochemical nke ihu kọntaktị nke ọla ndị na-adịghị ahụkebe na-emepụta batrị n'ihi ọdịiche dị na ikike electrode dị n'etiti ọla, si otú ahụ na-ebute corrosion nke metal anode.
Usoro iji gbochie corrosion electrochemical: Nke mbụ, ọ kacha mma iji otu ihe ígwè ahụ maka ọwa mmiri na-asọpụta nke mgbapụta ahụ; nke abụọ, jiri anodes iji chebe metal cathode.

7. Intergranular corrosion
Intergranular corrosion bụ ụdị corrosion mpaghara, nke na-ezo aka na mmiri ozuzo nke chromium carbide n'etiti ọka igwe anaghị agba nchara. Intergranular corrosion na-emebi emebi nke ukwuu na ihe igwe anaghị agba nchara. Ihe nwere corrosion intergranular na-efunahụ ike ya na plasticity fọrọ nke nta ka ọ bụrụ kpamkpam.
Usoro iji gbochie corrosion intergranular bụ: annealing igwe anaghị agba nchara, ma ọ bụ iji ultra-low carbon igwe anaghị agba nchara (C<0.03%).

8. Yiri na corrosion
Abrasion corrosion na-ezo aka n'ụdị nbibi nke mmiri na-agba ọsọ n'elu igwe. Mbipu mmiri mmiri dị iche na mbuze nke ụmụ irighiri ihe siri ike na-akpata na-akpata.
Ihe dị iche iche nwere ihe mgbochi dị iche iche na mgbochi corrosion. Usoro nke iyi na nguzogide corrosion site na ogbenye ruo ihe ọma bụ: ferritic Cr steel