Abu na polyethylene mai ƙarfi ya zama ƙarfin kuma yana nufin ƙarfin tuba na HDPE a cikin al'ummar da suka dace ba.

Kimiyar abu: Yaya tsarin molekular na HDPE yana bada ƙarfin a cikin al'ummar da suka dace ba

Ƙarfin mai kyau na tuba na HDPE yana daga tsarin polymer na musamman. Karkara mai ƙarfi—ta hanyar 70–80%—yana daga tsarin linear da suka ci gaba da kuma yana haɗawa da tsarin ƙarfin da suka ci gaba. Wannan tsarin hydrocarbon mai ƙarfi yana nufin kuzari na elektro-kimiyar kuma yana nufin kuzari daga microbes na tsohuwa, asidu, kuma shinkafa, wanda ba ta hanyar metals ko concrete da suka kuzari daga oxidation ko reactions na kimiyar.

Babban crystallinity da inert hydrocarbon kashin baya hana lalata da lalacewa

HDPEs ƙananan rassan kwayoyin halitta suna ba da damar yankuna masu ƙarancin lu'ulu'u don samarwa, suna ba da:

• Impermeability zuwa ions da gurɓatattun abubuwa waɗanda ke haifar da lalata a cikin bututun ƙarfe
• Rashin ruwa wanda ya tsayayya da haɗuwa da biofilm da lalataccen ƙwayar cuta (MIC)
• Rashin aiki zuwa halayen electrochemical, kawar da bukatun kare katodoji da ake buƙata don tsarin karfe

Tsayayya ga damuwa na muhalli (ESC) da tsufa na oxidative a cikin matsanancin zafin jiki (-40 °C zuwa 50 °C +)

Ayyukan wani abu yana da karamin ƙarfi kuma a cikin yadda mai zafi kuma saboda tsarin polymer na tashin gaba, wanda ya sanya ƙarfin fuskanci ba tare kafin kara karamin ƙarfi. Tsarin UV-stabilized da additivun additivun antioxidant sun ƙara ƙarfin ƙarfi—yana neman karamin ƙarfi na photo-oxidative a cikin wadanda suka faru a dukkanin wadanda suka faru kuma yana neman free radicals wanda suka haɗa karamin ƙarfi na thermoplastic. Wannan tsarin molecular mai ƙarfi ya sa amsa daidai a cikin yadda mai zafi da yadda mai ƙarfi, daga cikin arctic zuwa cikin yadda mai ƙarfi na sahara, ba tare kara karamin ƙarfi ko karamin ƙarfi.

Karamin ƙarfi na kimiyar mai ƙarfi: HDPE Pipe vs. Wadanda suka faru a cikin wani abu na kimiyar

Matsayin matsayi: HDPE pipe ya ƙara ƙarfin ductile iron, PVC, da steel mai ƙarfi a cikin yadda mai asidi, yadda mai salt, da yadda mai wastewater

Taba na polyethylene mai ƙarfi (HDPE) yana gaskiya da kuma kusantarwa na kimya a wani daga cikin juzun da ta zama. Kuma tsarin da ke taka da hydrocarbon da ya ƙara da kuma ƙarfin da ke taka da crystallinity yana bawa da kusantarwa—wannan shine abu da ke ƙarfi a ductile iron da steel mai kuskur, domin suka ci gaba da acidic ko saline media. PVC, wanda ya ƙara da kusantarwa, yana ƙara da kusantarwa da kuma kuskurin da plasticizers a lokacin da ya ƙara. A cikin al'ada na wastewater—inda pH yana canza da abubuwa masu ƙarfi kamar hydrogen sulfide suna yawa—HDPE yana ƙara da kusantarwa da kuma abubuwan da suka ƙara da kusantarwa suna ƙara da kusantarwa. Tabulari a sama da yanzu yana nuna farko na farko na farko na farko:

Fasali	Karama na HDPE	Ductile Iron	PVC	COATED STEEL
Kusantarwa da acids	Sunan Dadi	Mafi kyau (yana kusantarwa)	Yana da kyau	Mafi kyau (kuskur yana kusantarwa)
Kusantarwa da saline	Sunan Dadi	Mazama	Yana da kyau	Mafi kyau (yana kusantarwa da pitting)
Zaman da ya ƙara a wastewater	>50 years	<20 years (lined)	25–30 shekaru	15–20 shekara
Kira ta hanyar yin kari / kira ta fuskanci	Karami	Yawa (kura)	Matsayi na wasu (plasticizers)	Yawa (kura na coating)

Kira ta tsakanin pH ta dace (1–14) ta tabbatarwa ta hanyar bayanin al'umma da kuma bayanin kayan aikin kimika

Tutuntun HDPE ta aiki tare kai tsakanin kira ta pH—daga wasu kimikai masu ƙarfi (pH 1, misali: asidu sulfuric) zuwa wasu masu alkali (pH 14, misali: caustic soda)—wanda ya tabbatarwa a cewa akwai kamar ɗaya da al'ummar suka amfani da su. Al'umar suka amfani da tutuntun masu kura wadda suka gudan su da alkali da wasu masu ƙarfi a cewa akwai kamar ɗaya ba su kura tutuntun. A kayan aikin kimika, HDPE ta bincika steel mai coating a siffofin kimikai masu ƙarfi, ta kare kura, ta kare karamin tutuntun, kuma ta kare karamin coating ko cathodic protection wanda ke cire maki. Wadannan ayyukan sun nuna cewa HDPE ta aiki tare kai ba ta bukata kuma ta zama babu wani abu da za a iya amfani da shi a cewa akwai kamar ɗaya.

Tabbatar da ingancin tsari na dogon lokaci: Rashin ci gaba da haɓaka da kuma tsawon shekaru 50 +

Tabbatar da gwajin ISO 13479 da ASTM D5397 wanda ke tabbatar da juriya na bututun HDPE ga jinkirin haɓaka fashewa a ƙarƙashin ɗora kaya

Ana tabbatar da amincin tsarin bututun HDPE na dogon lokaci ta hanyar gwajin daidaitattun ISO 13479 da ASTM D5397 waɗanda ke kwaikwayon shekarun da suka gabata na ɗora matsin lamba don tantance juriya ga jinkirin haɓakar fashewa (SCG). Wadannan hanyoyin sun tabbatar da yadda tsarin kwayoyin HDPE ke hana farawa da yaduwa a cikin mawuyacin yanayi. Ba kamar kayan da ke da saurin lalacewa ba, HDPE yana riƙe da daidaiton tsari koda tare da ƙananan lahani, yana ba da ƙarin aiki da kuma aikin da za'a iya hangowa. Sakamakon haka, bututun HDPE koyaushe yana samun rayuwar sabis sama da shekaru 50 a cikin rarraba ruwan birni, sarrafa ruwan sama, da bututun aikin masana'antugoyan bayan shekaru da yawa na aikin filin da kuma yarjejeniyar gwaji da aka yarda da ita a duniya.

Tambayoyi Masu Yawan Faruwa

Wani abu ne ya sao HDPE pipes su zama mai tsayi da kariya da kariya?

HDPE pipes suna da darajarin crystallinity mai yawa da backbone na hydrocarbon wanda ba a iya gudanarwa ta. Wadannan daga cikin alamarin su ke takaici kariya, kariya na biofilm, kariya mai zuwa da mikrobiyolohiya (MIC), da yadda suka yi amfanin elektrochemical.

Yadda HDPE ya tsaya da harshin yankin gaba'aya?

Tsarin polymer na HDPE wanda ke da karama ya sa ita ta zama mai tsayi da kariya a yankin gaba'aya daga −40°C zuwa 50°C+. Additives kamar UV stabilizers da antioxidants suka takaici ita daga kariya na photo-oxidative da suka kara yadda ita ke dauke.

Wace sabon ne HDPE pipes suna amfani da su a yankin wastewater da chemical?

HDPE pipes suna fi kuma daga wasu abubuwan da aka shiga kamar ductile iron, PVC, da steel mai kariya a yankin acidic, saline, da wastewater saboda kariyar su ga attacks na chemical da kariyar su na structure.

Yadda yanzu ne yadda HDPE pipes su dauke?

Kulawa na HDPE suna da zaman kansa na amfani da yanzu ya ƙasa daga 50 shekara, wanda aka tabbatar da shi ta hanyar testin ISO 13479 da ASTM D5397 don gaskiya na kuskure na yawa da kuskure na gaba.

Yaya ne HDPE tana yi aiki da gaba na pH?

HDPE tana yi aiki da kyau a cikin gaba na pH (1–14), wanda ke nufin cewa yana daidai don al’ada na asidu masu zafin, alkali da kimiyar masu amfani a kasuwanci.