TL;DR —Malinga ndi zomwe ndakumana nazo pofotokoza zinthu zotenthetsera m'malo opitilira 40 okonzera chakudya ku Asia, zinthu zotenthetsera zopangidwa ndi chitsulo chosapanga dzimbiri zimakhala nthawi yayitali nthawi 3-5 kuposa zotenthetsera zopangidwa ndi aluminiyamu pansi pa chinyezi chenicheni. Ndayesa kusiyana kwa zipinda zopopera mchere zolamulidwa, ndawerengera ndalama zosinthira pazaka 5 zokonza, ndipo ndakhala ndikupepesa kwa oyang'anira mafakitale ngati njira yotsika mtengo yalephera pa mwezi wa 14. SS304/316 imakana kutayikira kwa chloride kuchokera ku mchere wouluka ndi mankhwala a CIP omwe amawononga zojambulazo za aluminiyamu mkati mwa miyezi 18-24. Pakusungirako kouma ndi kugwiritsa ntchito mufiriji, ndikupangirabe zojambulazo za aluminiyamu - ndi chinthu chabwino kwambiri ngati chikugwirizana ndi malo oyenera. Pamalo aliwonse opangira zinthu okhala ndi madzi, nthunzi, kapena sanitizer, sindidzavomereza chilichonse chochepera SS304 choyikidwa mu sheath.

Chifukwa Chake Ndimaona Zinthu Zotenthetsera Zikulephera Mwamsanga M'zomera Zakumwera cha Kum'mawa kwa Asia

Ndayenda m'malo opangira chakudya ku Thailand, Vietnam, Indonesia, ndi Philippines kwa zaka zisanu ndi zitatu, ndipo ndikukuuzani chomwe chimapha zinthu zotenthetsera m'derali mwachangu kuposa kwina kulikonse. Chinthu choyamba chomwe chimakugwerani pamalo opangira zinthu si phokoso - ndi chinyezi. Mu fakitale ya zakumwa ku Bangkok yomwe ndidapita chaka chatha, chinyezi chamkati chinali pa 87% nthawi ya 08:00 AM, ngakhale ndi mpweya wothamanga kwambiri. Madziwo adatuluka kuchokera pamwamba pa mapaipi omwe anali pansi pa zida zomwe zili pansi. Ndinayeza 34°C mlengalenga ndi hygrometer yanga: dothi la mame linali 2°C pansi pa kutentha kwa mpweya. Malo aliwonse achitsulo anali onyowa nthawi zonse.

Phatikizani zimenezo ndi mankhwala oyeretsera zakudya — peracetic acid pa 200-500 ppm, sodium hypochlorite pa 100-200 ppm, quaternary ammonium compounds — ndipo nditha kuneneratu molondola pamene chinthu chotenthetsera chosatchulidwa chidzalephera.AMPP, dzimbiri m'malo opangidwa ndi mafakitale onyowa limawonjezeka ndi 2-4 poyerekeza ndi malo ouma. Mu chomera cha chakudya cha ku Asia cha ku Southeast komwe chinyezi chimakhala pamwamba pa 80% kwa miyezi 8-10 ndipo mankhwala ophera tizilombo toyambitsa matenda a chlorine amapopedwa tsiku lililonse, deta yanga ikuwonetsa kuti chiwopsezo cha dzimbiri chimakhala chokwera ndi 5-8 kuposa momwe pepala la wopanga limanenera.

Izi zikutanthauza chiyani:Opanga zinthu zambiri zotenthetsera amagwiritsa ntchito nthawi yokwanira yogwiritsira ntchito zinthu zotenthetsera zomwe zili mu labu — 25°C, 40% RH. Fakitale yokonza chakudya ku Jakarta kapena Ho Chi Minh City yomwe imagwira ntchito maola 24 ndi ukhondo usiku si malo otere. Ndawonapo chinthu chofananacho chikupulumuka zaka 5 mu buledi waku Germany koma chikulephera m'miyezi 14 ku malo ogulitsa nsomba ku Vietnam — chifukwa malo ogwirira ntchito anali osiyana kwambiri.

Ndinaphunzira izi mu 2019 pamene ndinatumiza zotenthetsera za aluminiyamu ku mzere wopangira mkaka wa kokonati ku Samut Sakhon, Thailand. Chikalatacho chinalonjeza kuti "chidzakhala ndi moyo wautali: zaka 5+ pamagetsi oyesedwa." Pofika mwezi wa 16, manejala wa fakitaleyo ananditumizira zithunzi zomwe ndimasunga mu chikwatu cholembedwa kuti "Sipadzakhalanso." Chilichonse chinawonetsa dzimbiri pamalo olumikizirana a foil-polymer - foil yodulidwa, guluu wachikasu wonyezimira, waya wotsutsana ndi kuwala. Ndinavomereza kuti chisinthidwe chonse chikhale chotsimikizika, ndinapita kumalo osungiramo zinthu, ndipo ndinakhala masiku atatu ndikukonzanso ku SS304. Ulendo umenewo unali wokwera mtengo kuposa ndalama zonse zoyambirira, ndipo unandiphunzitsa zomwe tsopano ndimauza mainjiniya aliyense watsopano:Mu kukonza chakudya ku South Asia, kusankha zinthu zotenthetsera ndi vuto loyamba lofanana ndi chilengedwe, kenako vuto la kukonza mitengo.

Zofunikira pa Zinthu: Momwe Ndingasiyanitsire Pakati pa Chidebe cha Chitsulo Chosapanga Dzimbiri ndi Kapangidwe ka Aluminium Foil

Ndikatchula "chotenthetsera chachitsulo chosapanga dzimbiri," ndikufotokoza kapangidwe ka chubu komwe waya wokana wa NiCr 80/20 uli pakati penipeni mkati mwa chubu chopanda msoko cha SS304 kapena SS316, chozunguliridwa ndi ufa wopangidwa ndi magnesium oxide (MgO) womwe umateteza wayayo (>100 MΩ) ndi kuuphatikiza ndi kutentha. Malekezero a chubu amatsekedwa ndi zisindikizo zagalasi-ku-chitsulo - zomwe ndimakonda kwambiri m'malo onyowa. Ndikanena kuti "chotenthetsera cha aluminiyamu," ndikutanthauza kapangidwe kathyathyathya, kosinthasintha komwe waya wokana amamangiriridwa pakati pa zigawo za aluminiyamu ndikulumikizidwa ndi guluu wa polymer (polyester, polyimide, kapena silicone). Ndimafotokoza izi kuti zikhale zogwiritsidwa ntchito pang'ono kapena pomwe malo otenthetsera ayenera kuzungulira mawonekedwe ovuta.

Koma nayi kusiyana kwakukulu:Chigoba cha SS chimapanga chotchinga chachitsulo chopanda chotchinga chomwe chimalekanitsa waya wotenthetsera mkati ndi chilengedwe. Chotenthetsera cha aluminiyamu chimagwiritsa ntchito zomatira za polima kuti zitseke chilengedwe. Malinga ndiBuku la Engineering Toolbox lonena za kukana dzimbiri, zitsulo zolumikizidwa ndi polima m'malo ozizira zimawonongeka chifukwa cha hydrolysis ya chinyezi — polima imayamwa chinyezi, imataya mphamvu ya bond pang'onopang'ono, ndipo imatha kulephera popanda chenjezo looneka mpaka delamination itachitika. Ndayang'ana zinthu zomwe zimawoneka bwino kunja koma zidataya 80% ya mphamvu ya bond yawo yamkati.

Kuyerekeza kwa Gawo la Kapangidwe ka Kapangidwe komwe ndimagwiritsa ntchito pa Zofunikira za Makasitomala

Sindimaona izi zikukambidwa kawirikawiri m'mabuku a zinthu zotenthetsera, koma nayi nkhani yaikulu:Chotenthetsera cha aluminiyamu chimawoneka chopikisana papepala — chotsika mtengo ndi 2-3x, chopepuka, chosinthasintha. Koma pansi pa 85%+ RH yokhazikika pa 35°C — mikhalidwe yomwe ndayesa mkati mwa zomera zaku Asia zaku Asia nthawi ya mvula — zomatira zopangidwa ndi polyester zimadutsa mu hydrolysis. Ma ester bonds mu polymer backbone amagawanika pamaso pa mamolekyu amadzi pa kutentha kwakukulu. Ndakhala ndi zitsanzo zolephera kufufuzidwa ndi labu ya polymer, ndipo FTIR spectra yatsimikizira kusweka kwakukulu kwa unyolo mu guluu. Ichi si vuto lopanga — ndi malire a fizikiki a dongosolo la zinthu za polyester.

Ndimagona bwino ndikatchula SS304/316 chifukwa cha zomwe ilibe:palibe chisindikizo cha polima chomwe chingawonongeke, palibe chingwe chomatira chomangira kuti chigwiritsidwe ntchito ndi hydrolyze, palibe zinthu zachilengedwe mu njira ya chinyezi. Njira yokhayo yolowera ndi kudzera mu zisindikizo zomaliza, ndipo zisindikizo zosankhidwa bwino kuchokera ku galasi kupita ku zitsulo zimasunga umphumphu kwa zaka 5-10+ — Ndili ndi deta ya m'munda kuchokera ku makonzedwe kuyambira mu 2017 omwe akadali ndi mayeso oletsa kutetezedwa kwa 500V pa >50 MΩ.

Deta Yanga Yoyesera Kudzimbiri: Momwe SS ndi Aluminium Foil Zimagwirira Ntchito Pansi pa Mikhalidwe ya ku Asia

Sindidalira mapepala a deta a ogulitsa kuti ndiyerekezere dzimbiri — ndavutika ndi zotsatira za mayeso ofulumira omwe satanthauza kuti ndi zenizeni. Ndikayesa kulimba, ndimayesa njira zitatu: dzimbiri lofanana pamwamba, dzimbiri lozungulira, ndi dzimbiri la galvanic pamalo osiyana achitsulo, ndipo ndimapereka zotsatira zake mu mawonekedwe ofanana kuti makasitomala anga athe kufananiza deta yawo pazaka zambiri.

Kuyesa kwa Mchere: Zotsatira Zanga za ASTM B117

TheASTM B117-19Njira yothira mchere ndiyo mayeso omwe ndimayesa pa chilichonse chatsopano chotenthetsera - 5% NaCl mist pa 35°C m'chipinda cholamulidwa. Ndikudziwa kuti mayesowa ali ndi zoletsa (sabwerezabwereza momwe zinthu zimakhalira nthawi zonse komanso nthawi youma ndipo malo okhala ndi mchere nthawi zonse ndi amphamvu kwambiri kuposa zochitika zenizeni), koma amapereka maziko ofanana omwe amandithandiza kuyika zinthu moyenera.

Nayi deta yochokera mu mayeso anga— Ndinayendetsa zinthu zonse ziwiri za SS304 zokhala ndi chivundikiro ndi zinthu za aluminiyamu zojambulazo kudzera mu ma cycle ofanana a ASTM B117 a maola 1,000 m'chipinda chathu choyesera cha fakitale. Ndinayang'ana zitsanzo pa nthawi ya maola 100 ndipo ndinalemba chizindikiro choyamba cha dzimbiri looneka, mfundo ya dzimbiri la pamwamba pa 50%, ndi mfundo yolephera kugwira ntchito (yomwe imatanthauzidwa ngati kukana kwa insulation komwe kumatsika pansi pa 1 MΩ pa 500V DC):

Mapeto ake ndi omveka bwino:Zinthu zokhala ndi chivundikiro cha SS zimapulumuka nthawi yonse yothira mchere ya maola 1,000 ndi kuwonongeka kwa zokongoletsa. Zinthu zopangidwa ndi aluminiyamu zimasonyeza kulephera kugwira ntchito — kuchotsedwa kwa pulasitiki, kukhudzidwa ndi waya, kusweka kwa insulation — isanafike pakati pa msewu. Ndikawonjezera zinthu zenizeni za ku Asia ku SE — chinyezi, kutentha, ndi chlorine sanitizer — kusiyana kwa magwiridwe antchito kumawonjezeka kwambiri, monga momwe ndalembera m'malipoti ochokera ku gombe la Thailand ndi Vietnam.

Kukalamba kwa Chinyezi: Zotsatira Zanga Zofulumira za 85°C/85% RH

Malinga ndi zomwe ndakumana nazo, njira yaikulu yowonongera chakudya si mchere — ndi chinyezi chambiri chomwe chimakhalapo nthawi zonse komanso kutentha kwambiri. Zipangizo zimatentha panthawi yopangira, zimazizira panthawi ya ukhondo, komanso zimaundana nthawi iliyonse yosinthira. Ndinayesa kukalamba kwa chinyezi mofulumira pa 85°C / 85% RH — pambuyo pakeIEC 60068-2-78— pa mitundu yonse iwiri ya zinthu kwa maola 2,000 otsatizana, kuyeza kukana kwa kutenthetsa mkati mwa maola 250.

Zinthu zopangidwa ndi aluminiyamu zinayamba kuwonongeka pakatha maola 350-400.Ndinatha kuona zizindikiro zoyamba za chikasu cha polima m'mphepete mwa zojambulazo pansi pa chokulitsa cha 10x. Pofika maola 1,000, ndinali ndi zitsanzo 6 mwa 10 zomwe zinali pansi pa 10 MΩ insulation resistance limited zomwe ndimaona kuti ndizomwe zimakhala zotetezeka kwambiri pa chinthu chilichonse chomwe chili pamalo onyowa opangira chakudya. Pa maola 1,500, guluu wa polima unali utasweka komanso wosweka - ndimatha kuchotsa zigawo za zojambulazo ndi msomali wanga, zomwe siziyenera kuchitika. Pofika maola 2,000, zitsanzo 7 mwa 10 zinali zitalephera kwathunthu: mwina zinadulidwa kuti ziume kudzera m'mipata ya chinyezi, kapena kuwonetsa dzimbiri la mkuwa (kuchokera ku maulumikizidwe a lead) ndi brown iron oxide (kuchokera ku waya wotsutsa) m'malo ochotsera.

Zinthu zanga za SS304 zomwe zinali ndi chivundikiro sizinawonetse kuwonongeka kwa ntchito mkati mwa maola 2,000.Kuteteza kwa MgO kunasunga >100 MΩ — Ndinatsimikizira izi ndi megohmmeter ya 500V DC yoyesedwa pa IEC 60335-1 nthawi iliyonse. Kusintha kokhako kunali kusintha pang'ono kwa mtundu wa pamwamba pa mipiringidzo ya weld. Chitsanzo chimodzi chinapanga malo ang'onoang'ono a dzimbiri pa chizindikiro cha chida pomwe gawo la passivation linakanda panthawi yopanga. Ndinapitirizabe kugwira ntchito, ndipo dzimbiri silinafalikire — kutsimikizira kumvetsetsa kwanga momwe gawo la chromium oxide lodzipangira lokha la SS304 limapangikiranso kuwonongeka. Komabe,Tsopano ndikusankha zida zotetezedwa panthawi yokhazikitsakupewa izi kotheratu.

KutengeraDeta yolimbana ndi dzimbiri yosonkhanitsidwa ndi The Engineering Toolbox, mayeso a 85/85 ndi njira yabwino yodziwira kulimba kwa kukonza chakudya kuposa kupopera mchere chifukwa imatsanzira njira yeniyeni yolephera yomwe ndimaiwona m'munda: kulowa kwa chinyezi nthawi zonse kudzera mu zomatira za polima, osati kuukira kwa mankhwala pazitsulo zowonekera.

Chomwe Chimayambitsa Chlorine: Zimene Ndaona Ndi Ma Sanitizer a CIP

Njira zambiri zotsukira zakudya ku SE Asia zimatsatiraMalangizo a FDA a HACCPndipo gwiritsani ntchito sodium hypochlorite pa 100-200 ppm. Ndawona magulu oyeretsa akupopera izi mwachindunji pa zinthu zotenthetsera panthawi yosintha ma shift. Mankhwalawa amakhala ngati filimu yopyapyala, yokhazikika pamene madzi akuphwa, mpaka nthawi yotsatira yopanga itatenthetsa ndikufulumizitsa zomwe zimachitika.

SS316 yokhala ndi 2-3% ya molybdenum imasonyeza kukana bwino kwambiri ku chloride attack.chifukwa molybdenum imalimbitsa gawo la chromium oxide lopanda ntchito. Ndimagwiritsa ntchito fomula ya PREN: PREN = %Cr + 3.3 × %Mo + 16 × %N. SS304 imapeza pafupifupi 18-20; SS316 imapeza 24-26. Malangizo anga ochepa a PREN okhudza chlorine sanitizer ndi 22 — SS304 ndi yovomerezeka pang'ono, ndipo ndimasinthira ku SS316 pa CIP iliyonse kapena malo otsukira. Aluminiyamu wamba ilibe njira yofanana yotsukira dzenje — gawo lake la oxide lopangidwa mwachilengedwe limawomberedwa mosavuta ndi ma chloride ions, makamaka akatentha (>40°C) komanso acidic (

Malo opangira nkhono ku Can Tho, Vietnam ankagwiritsa ntchito mapepala otenthetsera a aluminiyamu pansi pa makina oumitsira zitsulo - kapangidwe kamene kanapangidwa ndi wogulitsa zida zoyambirira. Njira yoyeretsera inali 150 ppm sodium hypochlorite yomwe inkapopedwa maola 4 aliwonse. Patatha miyezi 8, ndinayang'ana zinthu zomwe sizinali bwino: maenje a pinbowo kuchokera ku chlorine yomwe inkamenyana ndi zojambulazo zopyapyala za aluminiyamu pamalire a tirigu, ndikupanga ngalande zazing'ono za dzimbiri zomwe zinadutsa pamwamba. Ndinasintha makinawo ndi zotenthetsera za cartridge zokhala ndi SS316 m'mabulaketi oyika zitsulo zosapanga dzimbiri okhala ndi madzi otuluka m'mphepete. Patatha zaka ziwiri, zinthu za SS316 sizinawonetse kuwonongeka kulikonse. Ndinawerengera ROI: mtengo woyamba wa SS316 unali wokwera ndi 2.8x kuposa woyamba wa zojambulazo za aluminiyamu, koma ndinapewa nthawi yopuma yokha ndinapezanso mtengowo mkati mwa miyezi 11.

Ine ndikutanthauzadeta yokhazikika ya zitsulo zosapanga dzimbiripofotokoza chifukwa chake SS316 yasinthidwa. Kuchuluka kwa molybdenum sikuli kotsatsa malonda - ndi kusintha komwe kumayesedwa, kotsimikizika ndi zitsulo. Ndikhoza kunena za njira ya PREN, deta ya ASTM B117, ndi zotsatira za Can Tho - umboni wodziyimira pawokha wotsimikizira mfundo imodzi.

Nthawi Yogulira Zinthu Zaka Zisanu: Zimene Ndinazitsatira Pakukhazikitsa Kwanga

Ndapeza deta yokonza kuchokera ku malo 14 okonzera chakudya ku Asia — 7 pogwiritsa ntchito zinthu za SS304/316 zokhala ndi chivundikiro, 7 pogwiritsa ntchito zojambulazo za aluminiyamu. Ndatsata magulu asanu a ndalama: zida zosinthira, ntchito ya anthu awiri, nthawi yogwira ntchito yokonza, kuyitana anthu mwadzidzidzi, ndi kuyang'anira chitetezo chamagetsi pambuyo posintha malinga ndi IEC 60335-1.

Nayi deta yonse ya zaka 5 — ndasintha ndalama zonse kukhala 100, pomwe 100 ikufanana ndi ndalama zonse za zaka 5 zoyika SS304:

Ndikufuna kunena momveka bwino zomwe nthawi ino ikundiphunzitsa.Mosakayikira, chinthu chopangidwa ndi aluminiyamu chimapambana chaka choyamba pa mtengo wake - ndipo ndikanakhala kuti ndikuyang'ana pa nthawi yogula ya miyezi 12, ndikanasankha chopangidwa ndi aluminiyamu nthawi iliyonse. Koma mafakitale opangira chakudya omwe ndimagwira ntchito ndi ndalama zomwe ndimawononga pazaka 5-7. Pofika chaka chachiwiri, mtengo wonse wa chopangidwa ndi aluminiyamu wapitirira kale SS304 yonse chifukwa ndakhala ndikusintha zinthu m'malo opitilira theka la malo omwe ndimayang'aniridwa. Pofika chaka chachitatu, njira yopangidwa ndi chopangidwa ndi aluminiyamu imadula nthawi 2.5 kuposa SS304 chifukwa kuchuluka kwa zinthu zomwe zimasinthidwa kumawonjezeka - kuwonongeka kwa dzimbiri kumachitika pang'onopang'ono komanso kumawonjezeka, ndipo nthawi iliyonse yosinthidwa imayambitsa zinthu zatsopano pamalo omwe sanasinthe, kotero zimalephera pa nthawi yomweyo yofulumira monga zoyambirira.

Uwu ndi mkangano wokhudza imfa ya kukonza womwe ndauona m'malo atatu osiyanasiyanaNdisanawalimbikitse kuti asinthe. Fakitale imagwiritsa ntchito mapepala otenthetsera a aluminiyamu chifukwa ndi otsika mtengo pa unit iliyonse. Zinthu zimayamba kulephera kugwira ntchito mwezi wa 14-18. Gulu lokonza limazisintha chimodzi ndi chimodzi panthawi yomwe nthawi yopuma ikukonzekera - zomwe zimawonjezera nthawi yopuma ndi maola 2-4 nthawi iliyonse, zomwe zimapangitsa kuti ntchitoyo ikhale yolimba. Pambuyo pa nthawi yachiwiri yosinthira, woyang'anira fakitaleyo wagwiritsa ntchito ndalama zambiri pa ntchito, nthawi yopuma, ndi zida zosinthira kuposa ndalama zoyambira zoyikira. Ndawona izi zikuchitika pa fakitale yokonza kokonati ku Thailand, fakitale ya noodles ku Jakarta, ndi mzere wa mabotolo a msuzi wa nsomba ku Phan Thiet. Nthawi iliyonse, kusintha kukhala zinthu zophimbidwa ndi SS304/316 - makamaka zathunjira zotenthetsera mafakitale zopangidwa mwamakonda— ndinathetsa vutoli. Nthawi yobwezera yomwe ndinayesa inali kuyambira miyezi 11 mpaka 16, yomwe ndimaiona kuti ndi yofanana kwambiri pa ntchito zosiyanasiyana komanso mphamvu za ukhondo.

Buku Lotsogolera la Kusankha kwa Jake: Kufananiza Zinthu Zotenthetsera ndi Malo Anu Ogwirira Ntchito

Sindikhulupirira malangizo okhudza zinthu zonse zofunika. Fakitale iliyonse yokonza chakudya ili ndi malo ambiri otentha okhala ndi kuopsa kosiyanasiyana kwa chilengedwe, ndipo ndapeza kuti zofunikira zimasiyana malinga ndi malo omwe ali mkati mwa malo omwewo. Nditalemba malo 14 ku South Asia, ndapanga njira yosankha yomwe ndimagwiritsa ntchito pamapulojekiti anga onse opereka upangiri. Iyi si njira yongoganizira - malangizo aliwonse amathandizidwa ndi deta ya m'munda kuchokera ku malo osachepera atatu otsimikizika ogwirira ntchito.

Ndimalandira funso limodzi kuchokera kwa woyang'anira kugula zinthu aliyense:"Bwanji osatchula SS316 kulikonse?" Yankho ndi loti ndalama sizili zokwera. Pa malo osungiramo zinthu mouma komanso mufiriji, SS316 imapereka phindu losayerekezeka - kuwonjezera 15-20% pamtengo wogwirira ntchito womwe sugwiritsidwa ntchito ndi kuwononga ndalama zambiri.

Ndikupangira kuyika malo anu m'malo asanu ndi limodzi omwe ali pamwambapa ndikuyendetsa mtengo womwe wayembekezeredwa kwa zaka 5. Mu malo opitilira 40 omwe ndapanga mapu, hybrid specification imapatsa 20-30% ya malo, SS304 kukhala 50-60%, ndi SS316 kukhala 10-20%. Mtengo woyikidwawo uli pansi pa 40-60% ya njira ya SS316, yokhala ndi kudalirika kofanana. Ndimawunikanso specifications ngati gawo la chilichonsepulojekiti yotenthetsera yapaderaNdikuvomereza — ndidzatsatira dongosolo lomweli ndi inu ndipo ndidzakupatsani upangiri wanga wowona mtima ndi deta yothandizira.