Dab tsi yog Green Corrosion ntawm Brass?
Ntsuab lossis xiav -ntsuab tshuaj uas tsim rautooj dag fittingshu uaverdigris. Verdigris yog cov tshuaj tiv thaiv ntuj tsim, tsis yog qhov tsis xws luag hauv cov hlau. Nws yog tib yam patina uas txhob txwm cog qoob loo ntawm lub ru tsev tooj liab thiab cov mlom, xws li Pej thuam ntawm Liberty. Thaum nws zoo li ceeb, nws feem ntau yog ib qho qhia tias qhov haum tau raug rau ib puag ncig tshwj xeeb rau lub sijhawm ntev.
Qhov Yooj Yim Chemistry Qab Xim
Cov xim ntsuab los ntawmtooj liabnyob rau hauv lub tooj dag alloy. Ntshiab tooj liab reacts nrog cov ntsiab lus nyob rau hauv cov huab cua. Thaum lub sij hawm, tooj liab tsim ntau lub tebchaw: Copper Carbonate (Cu₂CO₃(OH)₂) yog ntsuab. Copper Oxide yog xim av / dub (thawj theem). Copper Chloride yog xiav -ntsuab (ze dej ntsev). Nws yog lub xub ntiag ntawm noo noo, oxygen, thiab carbon dioxide los yog sulfur uas hloov cov xim av patina ntsuab.
Ib puag ncig ua rau Verdigris
tooj dag fittingstig ntsuab rau ntau yam ib puag ncig. High humidity yog thawj catalyst; huab cua ntub ua kom cov tshuaj tiv thaiv. Kev raug ntsev yog lwm qhov tseem ceeb; hiav txwv huab cua qhia cov tshuaj chlorides uas tsim xiav -ntsuab tooj liab chloride. Acid nag accelerates qhov tsim ntawm tooj liab sulfates. Txawm nyob hauv tsevtooj dag fittingstuaj yeem tig ntsuab yog tias raug cov av noo tas li thiab huab cua tsis zoo.
Verdigris puas tsim kev puas tsuaj rau Brass Fitting?
Los ntawm ib tug neeg kho tshuab foundations, lub ntsuab patina rautooj dag fittingsfeem ntau yogtsis muaj teeb meem. Qhov tseeb, ib zaug tsim, txheej ruaj khov ntawm corrosion ua raws li kev tiv thaiv kev tiv thaiv. Nws seals qhov saum npoo ntawm cov hlau, tiv thaiv kev nkag mus tob dua ntawm oxygen thiab noo noo. Tsis zoo li cov liab, flaky xeb ntawm hlau uas rhuav tshem hlau, ntsuab patina khaws cov tooj dag hauv qab.
Thaum twg Verdigris muaj kev phom sij?
Thaum lub patina nws tus kheej tiv thaiv, cov xwm txheej uas ua rau nws tuaj yeem ua rau puas tsuaj. Yog xim ntsuab tshwmhauv lub cevlos yog haum, nws txhais tau hais tias raug rau acidic dej los yog aggressive chemicals. Yog hais tias qhov haum yog flaking, powdery, los yog cov tshuaj ntsuab ntxuav tawm yooj yim, qhov no tsis ruaj khov patina. Qhov no yog active corrosion. Koj yuav tsum coj mus rhaub covtooj dag haumnrog lub cuab yeej hlau. Lub suab "ping" txhais tau hais tias nws yog suab. Ib tug dull "thud" qhia txog kev puas tsuaj.
Distinguishing Verdigris los ntawm Dezincification
Nws yog ib qho tseem ceeb kom paub qhov txawv tsis muaj teeb meem ntsuab staining los ntawm qhov txaus ntshai corrosion ntawmdezincification. Dezincification tshwm sim thaum zinc tivthaiv ntawm tooj dag yaj, tawm hauv qab ib qho tsis muaj zog, pinkish tooj liab residue. Ib tug haum puas los ntawm dezincification yuavquaj dejthiab xav tias mos los yog spongy yog khawb nrog lub hau ntswj. Cov patina ntsuab yog ib zaj duab xis saum npoo uas feem ntau khawb tawm kom pom cov khoom daj daj hauv qab.
Health Risks (Safety Warning)
Thaum lub patina ruaj khov thiab tsis yooj yim absorbed, koj yuav tsum tsis txhob noj los yog nqus tau cov hmoov avtooj dag fittings. Tooj liab yog ib qho tseem ceeb ntxhia, tab sis mob tooj liab lom yog ua tau los ntawm cov koob tshuaj loj. Leaded tooj dag tuaj yeem ua cov hmoov lead hauv qee qhov dej. Verdigris (tooj liab acetate) yog tshuaj lom yog tias nqos. Ib txwm ntxuav koj txhais tes tom qab tuav cov tooj dag hnyav heev. Tsis txhob siv cov txheej txheem ntxuav ntawm cov kav dej hauv tsev uas yuav xa cov plua plav mus rau hauv huab cua.
Lub Xiav-Green Stain ntawm Chav Dej Fixtures
Ib qho kev tsis txaus siab feem ntau yog xiav -liab ntsuab nyob rau hauv dab dej los yog dab da dej. Qhov no feem ntau tshwm sim los ntawmacidic dej(pH tsawg). Cov dej dissolves tooj liab los ntawm lubtooj dag haumlos yog tooj liab kav, thiab cov dej tso cov tooj liab ntsev raws li cov dej evaporates. Qhov no yog lub cim qhia tias dej yog corrosive rau hlau. Kev kuaj dej thiab kev lim dej tsis zoo yuav xav tau.
Verdigris ntawm Sab Nraud Fittings
Rau sab nraum zoovtooj dag fittings, ntsuab verdigris yog ib txwm. Qhov tseeb, ntau tus engineers xav tias nws yog ib qho cim ntawm huab cua zoo. Lub patina ntawm bronze thiab tooj dag marine hardware yuav tsum. Qhov tshwj xeeb yog tias qhov haum yog nyob ze ntawm lub qhov cua tshuaj lom neeg lossis cov pa hluav taws xob. Nyob rau hauv cov ntaub ntawv no, ntsuab tej zaum yuav tooj liab sulfate vim acid los nag, uas yuav erode lub haum sai dua ntuj patina.
Yuav Ua Li Cas Tshem Tawm Verdigris (Yog Koj Xav Tau)
Yuav kom rov qab lub ci daj xim ntawm atooj dag haum, siv ib tug me ntsis acid. Ib qho tshuaj txhuam ua los ntawm cov kua txiv qaub los yog vinegar tov nrog baking soda ua haujlwm rau me ntsis tarnish. Rau tuab ntsuab corrosion, siv cov khoom siv tooj dag ua lag luam uas muaj oxalic acid. Tsis txhob siv cov ntaub plaub los yog hlau txhuam ntawm fittings koj npaj siab yuav rov siv dua; qhov no tshem tawm cov txheej tiv thaiv thiab tsim micro- khawb.
Thaum Yuav Hloov Green Fittings
A tooj dag haumuas tau hloov ntsuab tsis xav tau hloov tsuas yog vim ntsuab. Txawm li cas los xij, koj yuav tsum tau hloov nws yog tias ntsuab nrog dawb los yog liab hmoov deposits (dezincification), yog hais tias lub nto yog flaking los yog spongy, los yog muaj ib tug dej los ntawm qhov sib koom tes. Kev hloov pauv kuj tseem tsim nyog yog tias cov tshuaj ntsuab ntsuab nyob hauv cov yeeb nkab thiab cov dej yog acidic.
Summary: Harmless Patina vs. Active Corrosion
| Feature | Harmless Patina (Verdigris) | Dangerous Corrosion (Dezincification) |
|---|---|---|
| Xim | Txawm, ruaj khov ntsuab/xiav-ntsuab | Ntsuab nrog dawb / liab me ntsis |
| Nto | Nyuaj thiab du | Flaky, powdery, los yog spongy |
| Qauv | Khoom, nyuaj rau nkag mus | Mos, tuaj yeem khawb nrog yas |
| Qhov chaw | Feem ntau sab nraud nkaus xwb | Sab hauv lossis sab nraud |
| Suab | "Ping" thaum tapped | "Tub" thaum tapped |
| Kev ua | Tso nws los yog ntxuav nws | Hloov nws tam sim ntawd |
Nyob rau hauv feem ntau thaj chaw thiab architectural chaw, ntsuab patina rautooj dag fittingsyog ib qho teeb meem tshuaj pleev ib ce xwb. Nws ua raws li lub ntuj tiv thaiv foob rau cov hlau. Koj tsuas yog yuav tsum txhawj xeeb yog tias qhov haum zoo nkaus li mos, yog tias koj pom cov dej quaj los ntawm cov hlau, lossis yog tias cov xeb tuaj nrog flaking lossis hmoov dawb. Thaum muaj kev tsis ntseeg, coj mus rhaub rau qhov haum nrog tus ciaj ntswj; lub nplhaib khoom txhais tau tias koj tuaj yeem tso nws ib leeg.