Corrosion inzira yechisikigo, umo simbi inoparadzwa zvishoma nezvishoma nekemikari kana electrochemical process ichibatwa nenzvimbo yayo.Mamiriro ezvinhu ekuora ipH, CO2, H2S, machlorides, okisijeni uye mabhakitiriya.Oiri kana gasi inonzi "yakasviba" kana huwandu hwehydrosulfides, H2S, huchikwira kupfuura kazhinji.Okisijeni inonetsa zvakanyanya pamatsime ejekiseni, EOR.Nechekare kudzika zvakanyanya kukonzeresa mazinga akanyanya ekuora.Muchiitiko ichi, okisijeni scavanger inoshandiswa.
Utachiona hunogona kukura mukati mepombi uye matangi pasi pemamiriro eanaerobic, ayo anogadzira huwandu hwakanyanya hweH2S.Pitting mhedzisiro yeizvi uye inogona kuoma.Kuvaka mabhakitiriya kunonyanya kuitika mukushandiswa kwakaderera kwekukurumidza.Zvimwe zvinokonzeresa ngura itembiricha, mabrasion, pressure, velocity uye kuvapo kwezvakaoma.
Isu tinoziva anotevera akajairika marudzi ecorrosion:
1. Kuora kwenzvimbo: gomba, crevice corrosion, filiform corrosion
2. Galvanic corrosion
3. General kurwisa ngura
4. Kuyerera-kunobatsira ngura, FAC
5. Intergranular corrosion
6. De-alloying
7. Kuputika kwezvakatipoteredza: kushungurudzika, kuneta, H2-induced, liquid metal embrittlement
8. Fretting ngura
9. High tembiricha ngura
Kuti udzore corrosion matanho anotevera akakosha kutariswa:
● Taura zvakananga pakusarudza mashoko akakodzera.Nyanzvi dzeMetallurgic dzinotsanangura kuti ndedzipi simbi dzakanakisa kushandisa.
● Uyewo kupfekedza uye kupenda imisoro yakakodzera yekusarudza zvakanaka.
● Kugadzirisa kugadzirwa kuti kuwedzere kana kuderedza kukurumidza kwepombi.
● Kana zvimedu zviripo mumvura, kuderera kunogona kuva nani kwehupenyu hwose hwezviridzwa uye pombi.
● Kudzora pH, kuderedza huwandu hwechloride, kubvisa okisijeni nebhakitiriya uye kuderedza chiyero chesimbi oxidation nemajekiseni emakemikari.
● Kushanda uye kwakanakisa kuumbwa kwemakemikari kugadzirisa kudzvanywa kwepombi kana mudziyo panoda kupinda mvura.
Nguva yekutumira: Kubvumbi-27-2022