Lalacewa wani tsari ne na dabi'a, wanda a hankali karfe yana lalata shi ta hanyar sinadarai ko lantarki yayin da ake tuntuɓar muhallinsa.Abubuwan da aka saba na lalata sune pH, CO2, H2S, chlorides, oxygen da kwayoyin cuta.Ana kiran man fetur ko gas "mai tsami" lokacin da maida hankali na hydrosulfides, H2S, ya fi yawanci.Oxygen yana da matukar matsala akan rijiyoyin allura, EOR.Riga ƙananan ƙima yana haifar da ƙimar lalata.A wannan yanayin, ana amfani da ma'aunin oxygen.
Kwayoyin cuta na iya girma a cikin bututu da tankuna a ƙarƙashin yanayin anaerobic, wanda ke haifar da babban taro na H2S.Pitting shine sakamakon wannan kuma yana iya yin tsanani.Ƙunƙarar ƙwayoyin ƙwayoyin cuta galibi suna faruwa a cikin aikace-aikacen ƙananan gudu.Sauran abubuwan da ke ba da gudummawa ga lalata sune zafin jiki, abrasion, matsa lamba, saurin gudu da kasancewar daskararru.
Mun san nau'ikan lalata gama gari:
1. Lantarki na gida: pitting, crevice lalata, filiform lalata
2. Galvanic lalata
3. Lalata harin gaba ɗaya
4. Lalata-taimakawar kwarara, FAC
5. Intergranular lalata
6. De-alloying
7. Muhalli fatattaka: danniya, gajiya, H2-jawo, ruwa karfe embrittlement
8. Rashin lalata
9. High zafin jiki lalata
Don sarrafa lalata waɗannan matakan suna da mahimmanci don la'akari:
● Ka yi takamaimai wajen zaɓar abin da ya dace.Kwararrun ƙarfe na ƙarfe suna ayyana waɗanne karafa ne mafi kyawun amfani.
Har ila yau, shafi da zane-zane sune batutuwa masu dacewa don zaɓar da kyau.
● Daidaita samarwa don ƙarawa ko rage gudu a cikin bututu.
● Idan akwai barbashi a cikin ruwan, raguwa na iya zama mafi kyau ga rayuwar kayan aiki da bututu.
● Sarrafa pH, rage adadin chloride, kawar da iskar oxygen da kwayoyin cuta da rage yawan ƙwayar ƙarfe tare da allurar sinadarai.
● Inganci kuma mafi kyawun tsarin sinadarai don daidaita matsa lamba a cikin bututu ko jirgin ruwa inda ruwa ke buƙatar shiga.
Lokacin aikawa: Afrilu-27-2022