Farko na galvanized coil da sauransu na coated coils

Yadda Koyaya na Galvanized Ya Ba Aiki na Karya: Zinc Mai Karya vs. Wasu Wani Baki Na Karya Kuma

Aiki na karya na elektro-kimiyar: Yadda zinc ya karya kafin satali

Koilin da aka ganyenya ta kula steel ta hanyar amfani da aiki na electrochemical sacrificial—zinc ta fi yawa a galvanic series wanda ke nufin cewa ta zama mai kusanci kafin sauran abu idan ta dace da ruwa ko wasu elektrolit. Wannan aiki na cathodic protection ya kula steel na baya, tare da kaiyayen cut edges ko scratches, inda zinc ta kusanta domin samun layer na zinc carbonate patina wanda ke kula aiki da kai. Ba tare da barriers na passive ba, wannan mechanism ya yi aiki da kai don kuskure. Kullumun corrosion suka nuna wannan aiki na biyu—physical barrier da kuma electrochemical guard—wanda ke taimaka wajen kara lifetime na steel ta hanyar 5 zuwa 8 kari da shine a cikin alamu na moderate idan ba a ganye ba.

Farko da barriers na passive: Anodized aluminum oxide da polymer coatings (misali: polyester a PPGI)

Aluminum mai anodized da kwayoyin da suka daga polymer kamar PPGI suna iya amfani da tsarin gaba daya na fuskantar. Idan aka tsofai ko aka bari kwayar aluminum mai anodized, yanzu shine metal mai zuwa akan korrosion, saboda layi na oxide ta hanyar ta nemo wani abu da ke sauran kuma ba ta nemo wani abu da ke sauran. Kamar haka, PPGI mai polyester ta zama babu ta nemo a cikin lokacin da layi na resin ta kawo kari, kuma ta saba da kari na tsinko da ions. Idan waɗannan tsarinen suka fiye a cikin ala'adu da kuma a cikin tsarin UV, suka kara ta nemo a cikin galvanized steel ta nemo a cikin tsarin electrochemical. Bayanin industriya na kuzari ya nuna cewa layin polyester ta zama 15–20% ta kara kari na kari bayan biyu uku shekara, kuma ta kara kari na kuzari a cikin tsarin mekanikal ko thermal.

Haddadin gida: Karamin nemo na galvanized coil a cikin ala'adu mai asidi, mai chloride mai yawa, ko a cikin ala'adu mai kuzari

Kilin na galvanize ta hana kariya mai yawa a cikin ala'adu da ke sauya. Alama na asid (pH < 5) ta zama maimakon kariya na zinc da yawa kuma ta gudan yadda aka saba ya daga cikin ala'adu da ke tsaki. A yankin kusti, kofin gishiri na chloride ta zama electrolyte mai kariya wanda ya taka kariya na zinc don kariya mai sauƙi na cathodic. Kamar hakan, ala'adu na industriya kamar SO₂ da NOₓ suna zama alama na asid wanda suka taka kariya na zinc a lokaci mai zuwa. Kariya mai sauƙi na kariya ta nuna cewa yadda aka saba ya daga 50% a lokacin da aka yi amfani da shi—wanda ke nufi cewa kofin na alloy na aluminum-zinc ko kofin na barrier mai sauƙi ne suka fiye da kyau.

Kilin na galvanize vs. Kilin na Galvalume®: Tsarin na alloy, tsarin na kofin, da kariya na haɗa a yankin haɗa

55% Al–Zn microstructure: Kariya mai sauƙi da kariya mai sauƙi na kofin

Galvalume® coil yana amfani da 55% aluminum, 43.4% zinc, da 1.6% silicon alloy wanda aka tattauna su a cikin kwayoyin da ke nufin samun gudunmawa na madaidaici. Aluminum yana sanya barrier na oxide wanda ke zuba daidai da ke tsayayya daga moisture da oxygen, amma zinc particles wanda suka fara cikin al'ada suna bada cathodic protection a cikin kwayoyin da suka fara ko a cikin kwayoyin da suka rufe. Silicon yana taimaka wajen kuskuren coating a lokacin da aka yi forming da fabrication. Kamar yadda ya kashe kuma yana amfani da full sacrificial action kamar Galvanized coil, Galvalume® yana kuma kama 2–4× karin resistance don atmospheric corrosion—kamar yadda ya kashe kuma yana da aluminum wanda ke da efficiency mai kyau da ke zuba kafin yanzu. Yadda ya kashe kuma yana zuba a cikin pH ranges wanda ke ƙarƙashin aluminum yana zuba.

Kuskuren coating weight: G-90 (275 g/m²) vs. AZ-50 (150 g/m²) da suka hada da kuskuren aiki na service life a cikin kowane environment

Kwayar kuma ba ta nuna tsayin lokaci na amfani—yadda almu ya yi kuma yadda ake cikin jihar daidai ne kamar yadda ake cikin jihar. Galvanized coil na G-90 ta amfani da 275 g/m² na zinc; Galvalume® AZ-50 ta samu yadda ake cikin jihar ko yadda ake cikin jihar mai kyau da 150 g/m² na almu na Al-Zn-Si. A cikin jihar na dutsen duniya da sautin duniya, AZ-50 ta samu 25–30+ sanan na amfani—ta fi G-90—daga wajen kwayar aluminiam na kyau. Amma a cikin jihar na kusurci ko jihar na sana’a, chloride da acid suna tashi kwayar aluminiam sosai, kuma yana nufin yadda ake cikin jihar. A wannan baya, kwayar zinc na G-90 mai gyara da mai amfani sosai ta ba mu kwayar kariya na karami da tsayin lokaci na amfani. Tsayin lokaci na amfani ta nuna wannan karami:

Za a zaɓe bayyanan su daga wajen kwayar kimya—ba daga wajen kwayar kuma—kuma daga wajen yadda ake cikin jihar.

Pre-Painted Coils (PPGI/PPGL): Yadda Topcoats Suna canza Galvanized da Galvalume® Base Performance

Koatun na polyester da PVDF: Kariya ga UV, tsayin kuma yadda ake samun alama na kariya ga kariya ta hanyar tashin kariya

Koilin da suka kashe a baya sun haɗa ƙarfi na zink ko Galvalume® da kuma ƙarfi na organik na gaba—wanda ke ƙarƙashin yanzu shine polyester ko polyvinylidene fluoride (PVDF)—don fuskanci da kara tsawon amfani. Karkarar PVDF suna ba da tsarin mai kyau ga UV, wanda ya kara launin da shine shine a cikin rana ta hanyar 20 zuwa 30 shekara, amma polyester mai amfani yayi kuma yana ƙarƙashin yanzu ya ƙara launi ko ya ƙara shinkafa a cikin 10 zuwa 15 shekara. Suka yi amfani da su a matsayin karkara mai ƙarfi, amma karkarar PVDF na mai kyau don tsarin kimiyar da tsarin yadda ya ƙara karkara ta hanyar yadda ya ƙara karkara a cikin yadda ya ƙara karkara da yadda ya ƙara karkara—wanda ya kara karkara ga karkara na elektrolit don zuba a cikin ƙarfi na metal. A matsayin mahimmanci, wannan ya kara karkara ga karkara na tsarin karkara na karkara: don koilin da aka zink, ya kara karkara ga karkara na zink na karkara; don Galvalume®, ya kara karkara ga karkara na aluminum na oxide don kara karkara. Don haka, karkarar PVDF suna nuna karkara mai kyau a cikin yadda ya ƙara karkara—kamar yankin kusti da yankin sana’a—inda ruwa da mafadu suna kara karkara ga karkara na karkara.

Kuskuren Kuskuren:

Masu Sabon Gaskiya

Wani ne babban fayilin zink a koyon galvanize?

Zink a koyon galvanize ta ba muhimmin taimakawa mai amfani da elektro-kimya, wanda ya nufi kuma ya daga baya ga shanu na gaba daya, wanda ke taimakawa wajen karewa da shanu kuma kara yadda za a sanya gaba daya.

Yi amfani da Galvalume® yana faruwa daga koyon galvanize na farko?

Galvalume® ya amfani da aluminayum, zink, da silikon don taimakawa. Yanzu ya amfani da amfani mai amfani da taimakawa ba tare da kariya ba, amma ya ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba muhimmin taimakawa mai amfani da aluminayum, wanda ke ba mu......

A wani yadda za a zauna aluminayum-zink alloy coatings daga koyon galvanize?

Aluminayum-zink alloy coatings suna da amfani mai kyau a yadda za su yi amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminayum-zink alloy coatings daga koyon galvanize, wanda ke ba muhimmin taimakawa mai amfani da aluminay......