Inconel686 alloy muaj zoo heev corrosion kuj
INCONEL alloy 686 (UNSN06686/W.Nr.2.4606) yog ib-theem austenitic Ni-Cr-Mo-W alloy nrog zoo heev corrosion kuj nyob rau hauv ib tug ntau yam ntawm hnyav ib puag ncig. Nws cov nickel siab (Ni) thiab molybdenum (Mo) muab kev tiv thaiv zoo hauv kev txo qis, thaum nws cov chromium siab (Cr) muab kev tiv thaiv rau oxidizing media. Molybdenum (Mo) thiab tungsten (W) pab tiv thaiv hauv zos corrosion xws li pitting. Hlau (Fe) yog nruj me ntsis tswj los txhim kho kev ua tau zoo. Cov pa roj carbon tsawg (C) pab txo qis ciam teb nag lossis daus, yog li tswj kev tiv thaiv corrosion ntawm tshav kub-tshem tawm ntawm cov pob qij txha. Raws li cov alloy (Cr + Mo + W) cov ntsiab lus nce, qhov kev tiv thaiv rau kev xeb dav dav, pitting corrosion thiab crevice corrosion nce, nrog INCONEL Alloy 686 tau qhab nia siab dua cov khoom sib tw.
Corrosion kuj
INCONEL 686 alloy muaj kev tiv thaiv zoo rau tag nrho corrosion, kev nyuaj siab corrosion tawg, pitting corrosion thiab crevice corrosion. Nws tsis kam mus rau intergranular nag lossis daus thaum lub sij hawm vuam tso cai rau nws tswj nws corrosion kuj nyob rau hauv lub tshav kub-cuam tshuam cheeb tsam ntawm lub welded ob leeg.
Nws yog resistant rau txo acids, oxidizing acids thiab tov kua qaub tov. Nws yog tshwj xeeb tshaj yog haum rau tuav cov sib xyaw acids uas muaj cov ntsiab lus siab ntawm halides. Nws pom zoo ua siab ntev rau cov kua qaub sib xyaw nrog pH ntawm 1 lossis tsawg dua thiab cov ntsiab lus chloride tshaj 100, 000 ppm.
Inconel686 alloy yog nickel-chromium-molybdenum alloy nrog ib qho austenitic qauv. Cov khoom no tseem muaj kev tiv thaiv corrosion siab heev hauv qee qhov chaw hnyav. High Ni thiab Mo cov ntsiab lus tuaj yeem ua kom muaj kev tiv thaiv corrosion hauv kev txo cov xov xwm; Cov ntsiab lus Cr siab tuaj yeem ua kom muaj kev tiv thaiv corrosion hauv oxidizing media; Tsis tas li ntawd, qhov sib ntxiv ntawm Mo thiab W tuaj yeem pab txhim kho lub peev xwm tiv thaiv corrosion hauv zos xws li pitting corrosion; Cov ntsiab lus C tsawg tuaj yeem txo cov qoob loo ciam teb nag los nag, yog li tswj kev tiv thaiv intergranular corrosion nyob rau hauv cheeb tsam HAZ ntawm qhov sib koom ua ke. Feem ntau hais lus, kev tiv thaiv rau pitting corrosion thiab crevice corrosion nce nrog kev nce ntawm w (Cr + Mo + W). Piv txwv li, w (Cr + Mo + W) ntawm Inconel686 alloy yog 40.7%, uas siab dua Inconel625 alloy (30.8%) thiab 276 alloy (35.4%). Tsis tas li ntawd, lub hauv paus rau kev txiav txim siab pitting corrosion kuj ntawm alloys yog "pitting corrosion kuj sib npaug coefficient", uas yog, tus nqi PREN. Tus nqi siab dua, qhov ntau dua nws qhov kev tiv thaiv pitting corrosion.
Inconel686 alloy yog cov pa roj carbon tsawg, npib tsib xee-chromium-molybdenum-tungsten siab heev corrosion-resistant alloy nrog zoo heev tiv taus oxidation, txo thiab sib tov acid ib puag ncig (xws li halide-muaj ib puag ncig). Lub alloy yog resistant rau seawater thiab lwm yam marine ib puag ncig. Yog li ntawd, Inconel686 alloy yog dav siv nyob rau hauv chemical processing, shipbuilding thiab huab cua pollution tswj (flue gas desulfurization) industries. Lub alloy tsis kam mus rau ntau qhov chaw ib puag ncig ua rau nws yog ib tus neeg sib tw siv rau hauv ntau qhov dej corrosive.
