Wani abu ne da ke taimaka wajen kariya ta hanyar samun kariya na brass valve a marketin Najeran

Tsarin Kwayar Brass da Tsarin Alloki don Samunin Kasashen Nafasai na Mashaqilin Arewa

Copper-Zinc Ratio da Risksin Dezincification a Yadda Mai Zanin Chloride Cewa

Kusurin da ke ƙarfi na kwayoyin brass na gaba daya a sistemun ruwa na Najeran Kudu ta yadda suka yi daga nisba na copper-zinc. Dezincification—wani tsari na leaching mai amfani da wani abu ne—ya ci zinc daga alloy matrix don ya fi kuma ya baka cikin ruwa mai kyau, ya baka cikin copper mai zafi da kuma mai fuskanci. Wannan kusuri ya ƙara yawa a lokacin da chloride ya fi ƙarfi wanda ke cikin GCC, inda ruwan dariya da ruwan tsoho suna fi 200 mg/L chloride (Gulf Water Institute, 2021). Alloys wanda suka da zinc akan 15% suna da kusuri; misali, free-machining Alloy 360 (61.5% Cu, 35.5% Zn, 3% Pb) ba shi da kuskure wajen kusuri, kuma ya kuzo a cikin ruwan da ke amfani da kai da ruwan da ke amfani da kai—lakabi da kuma a lokacin da ruwa ta fi yawa ko ta fi yawa a lokacin da kai na gida na Najeran Kudu.

Kwamfani na gida na karama mai ƙarfi a Dubai sun nuna bayanin da suka fahimci: tsinku oxide mai rufi ko dukkanin tsinku mai yara, ko zazzau mai yara na kopper—bayani mai ban shi ne na dezincification wanda ya kashe composition, ba kuma karama mai ƙarfi.

Iyonin chloride suna amfani da su don sao na electrochemical, wanda ke sauya karamar zinc. Bayanin laboratori sun nuna cewa brass da yawa na zinc (30%) zai iya karya da kuma zai iya gudunmawa a matsayin watar Gulf, amma alloy DZR da aka sao daidai zai iya kuzo hakan yadda aka saba shi a cikin yanzu. Saboda haka, nisbatin copper-zinc ba ta fahimta na composition kuma — ta bayyana stabilitin electrochemical da matsayin ayyukan aiki na yanzu.

Tungar Tin, Arsenik, da Ladi a DZR Brass Valve Performance

Karama na yadda ake saukakarwa na gaba daya suka yi dukkanin brass na biyu (duplex) da ke ƙarfi don zama abu mai kariya wanda ya dace don amfani na kuma kuma ta hanyar fannin tsarin tashin abubuwa (valve). Arsenic shine abu na gaba daya wanda ya dace don yin amfani, ya shiga a matsayin karama (0.02–0.15%). Ya yi aiki ta hanyar samun karama na kariya a cikin karama na beta-phase—wanda su ne karama na gaba daya wanda za su iya kawo zinc daga brass—and ya taka karama na kariya na kuma ta hanyar fannin tsarin tashin abubuwa (cathodic oxygen reduction), wanda ya kare ta hanyar fannin tsarin tashin abubuwa (electrochemical reaction) wanda ke kawo dezincification. Ta hanyar kuma arsenic, brass na beta-phase—wanda su ne muna bukata don kuma ta hanyar fannin tsarin tashin abubuwa (hot-forging) na kuma ta hanyar fannin tsarin tashin abubuwa (valve bodies)—su kara kuma ta hanyar fannin tsarin tashin abubuwa (chlorinated water). ASTM B584 C85700 ya kawo karama na arsenic da ke ƙarfi don wannan sabon.

Gubar (1.52.5%) tana da manufa ta inji: taushi, ƙananan ƙwayoyinta suna inganta aikin ta hanyar aiki a matsayin masu fasa chip da kuma rufe ƙananan ƙananan porosity a cikin kayan da aka yi da suƙara ƙarfin matsa lamba a cikin tsarin gine-gine masu tsayi. Tin (~ 1%), kamar yadda aka samo a cikin nau'ikan ruwan tagulla na Naval, yana ƙara shinge na biyu ta hanyar tsayayye, oxides masu kariyamusamman masu mahimmanci a cikin ruwa mai laushi ko acidic. Tare, waɗannan abubuwan suna samar da kariya ta haɗin gwiwa: gwajin hanzari wanda ke maimaita sinadarin ruwan Gulf ya nuna arsenic DZR tagulla yana da tsawon sa'o'i 2000 ba tare da zurfin zurfin zurfin zurfin zurfin zurfin zurfin zurfin zurfin zurfin zurfin zurfin zurfin zurfin zurfin zur

Matsalolin Muhalli na Yankin da ke Shafar Tsawon Rayuwar Bawul na Brass

Salinity, Chlorine Residues, da Hardness a cikin GCC Desalinated da kuma Cibiyar Ruwa ta gari

Tsawon rayuwar bawul na tagulla a cikin tsarin rarraba GCC ya dogara da sinadarin ruwaba kawai daidaitaccen suna ba. Yayin da juyawa osmosis desalinate yana farawa tare da ƙananan TDS (<50 mg / L), haɗuwa tare da ruwan ƙasa na gida yana haɓaka ma'aunin chloride sama da 200 mg / L a cikin cibiyoyin sadarwa da yawa na birni (Gulf Water Institute, 2021), ƙofar da aka sani don hanzarta dezinci Rashin chlorine (0.52.0 mg/L), wanda yake da mahimmanci don sarrafa ƙwayoyin cuta, yana ƙara tsananta harin oxidativemusamman idan aka haɗa shi da yanayin zafin jiki na yanayi wanda ke wuce 40 °C a kai a kai. An ƙididdige hanzartawar zafi sosai: kowane ƙaruwa na 10 °C a cikin

Karama ta hada a matsayin biyu. Alkali mai karama (100–200 mg/L kamar CaCO₃) zai iya samun karama na karbonat wanda ke kare, amma RO permeate yana ƙarƙashin alkali kuma ba shi da buffer—wanda ke saukarwa ga karama na pitting, kamar yadda ake gani a cikin karama na chloride-to-alkalinity wanda ke fi 3:1. Tattaunawa na gida a Abu Dhabi da Doha suka nuna karama na brass valve wanda suka faru a farko a cikin 12–24 months a cikin karama na seawater cooling loops wanda ba suka kara karama, domin 5–8 years a cikin karama na hardness-stabilized systems. Tanan karama na materials zai bukatar yadda ake amfani da chemistry—ba a matsayin karama na karama ba.

Matsayin karama na corrosion wanda suka hada da brass valve a cikin yanki mai hawaye da mai karama

Dezincification da Stress Corrosion Cracking a cikin yanki mai hawaye da mai karama

A cikin yanayi mai zafi, danshi, bawul na tagulla suna fuskantar manyan barazanar biyu, masu alaƙa da juna: dezincification da damuwa lalata fashewa (SCC). Ana samun saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin saurin Babban haɗarin haɗarin haɗari ta hanyar riƙewa da fina-finai na danshi a kan jikin bawul din da aka fallasa, musamman a yankunan bakin teku ko yankunan da ke da zafi. Wannan madaidaicin layin mai amfani da lantarki yana ba da damar SCC: tsarin fashewa mai rauni wanda aka kunna lokacin da ƙarfin jan hankali daga ƙarfin juzu'i na taro, fadada zafi, ko matsin lamba yana hulɗa da abubuwan lalata kamar chlorides, ammonia, ko ma iska mai danshi. SCC mai saukin kamuwa da cutar yana ƙaruwa tare da sinadarin zinc da ƙarancin ƙarfin masana'antu.

Masu ingilishi suka kare waɗannan ƙarama ta hanyar yin amfani da DZR brass formulations—kamar yadda suka yi wajen ASTM B584 C85700 da arsenic content da aka tabbata—and applying post-forging stress-relief heat treatments. Wadannan ƙarama suka tabbata structural integrity a cikin kowane thermal da hygrometric range wanda ke ƙarfi na Middle Eastern infrastructure.

Gudunmawa na Alloys da aka saba da shi don Brass Valve Deployment a cikin Middle East

DZR Brass vs. Standard Brass: Field Evidence from UAE da Saudi Arabian Water Networks (2019–2023)

Al'amur na yanzu sun nuna farko mai kyau ɗin bayan kuma daga cikin kwayoyin brass na gaba daya da kuma kwayoyin brass DZR. A shugaban al'ada na Abu Dhabi, kwayoyin brass na gaba daya suka nuna dezincification mai kyau da kuma fittilin a cikin 18 zuwa 24 watan. Kuma kuma abin da ya sa hannun al'ada (2019–2023) ya rubuta farko na ƙarfi na 12% don kwayoyin brass na gaba daya wadanda suka yi amfani da ruwan desalinated wadanda aka tattaunawa—wadanda suka zama ƙarfi na ƙarfi ta 2% bayan ya zama a amfani da alloys DZR. Farko suka fito daga leaching na zinc na chloride daga bayan beta, wanda ya nuna cewa composition—ba hanyar sanya ba—ne ne ce sabon farko.

Kamar yadda aka fassara, shugaban ruwa na Saudi Arabia ya bayyana cewa ba a samu loss na mechanical integrity a kwayoyin brass DZR wadanda suka sanyawa a Riyadh hot water loops a cikin ƙarfin 4 watan. Wannan tsayayyen ya fito daga optimized heat treatment wadanda suka haifar da stablization na alpha phase da kuma suka baya electrochemical zinc dissolution—even in aggressive water chemistries.

ASTM B584 C85700 Binciken dacewa don Kogi da kuma Tsarin Gida na Desalination

ASTM B584 C85700a gubar rawaya tagulla tare da ~ 63% Cu da 1% Sn wani lokacin ana la'akari da jikin bawul, amma aikinsa ya lalace sosai a cikin yanayin teku da kuma kewaye da desalination. Duk da yake yana da tasiri a cikin ruwan sanyi mai sanyi, ba shi da isasshen kwanciyar hankali game da harin chloride a cikin yanayin zafi mai zafi, yanayin zafin jiki mai zafi. Binciken gazawar 2021 a wani tashar sarrafa gishiri ta bakin teku ta Qatar ya rubuta ta hanyar bango da kuma lalata kayan kwalliya a cikin bawul din C85700 a kan ruwan teku mai sanyaya bayan watanni 14 kawaiyana haifar da rufewa da maye gurbin gaggawa. An hanzarta lalacewa ta yanayin zafin jiki sama da 40 ° C da ci gaba da gishiri mai ɗumi, wanda ya lalata yanayin alpha na alloy.

Kusarar da aerosol na saltu yana kuma ƙarƙashin yawan abubuwa daga 5 km na kusarar kwayoyi. Don hakan, DZR brass mai tsayi ko alloys na duplex mai mahallin ayyuka wanda aka shigar da su don gudun taka da ionic yana ƙarƙashin yawan abubuwa na teknikai.

Sashen Tambayoyi

Wani ne dezincification?

Dezincification shine ƙaramin kuskure wanda zinc ya ƙare da alloys na brass wanda aka bayar da su ga al’amarin da ke ciki da kuskure, wanda ya baiwa da structure na copper ta zama porous.

Bakon baya brass ya zama mai kuskure a Najeran?

Yawan saltu, yawan harajen ruwa, da yawan chloride a system na ruwa na yankin yana kuskurewa a alloys na brass na gaba.

Wani ne DZR brass?

DZR (Dezincification Resistant) brass shine brass wanda aka shigar da su da abubuwa maimaita kamar arsenic don kuskurewa da kuskure da kuskure da zinc.

Yaya chemistry na ruwa ta fuskanta karkara na brass valve?

Faktarai kamar saliniti, klorin residuals da ƙarfi na ruwa suna iya gyara tsarin ƙaraman brass. A ruwan da ke da ƙarfi mai zaru, brass mai gaskiya yana kara daga cikin kuskuren.

Wane role wadanda abubuwan da suka kashe a cikin alloy DZR brass suke yi?

Abubuwan da suka kashe kamar arsenik suna kare dezincification, tin yana ba da corrosion resistance na biyu, da lead yana taimaka wajen kuskure da kuma kuskure na pressure-tightness.