Nkhani

Hot dip galvanizing, yomwe imadziwikanso kuti dip dip galvanizing ndi kutentha kwa dip dip galvanizing, ndi njira yabwino yopewera dzimbiri zachitsulo, zomwe zimagwiritsidwa ntchito popanga zitsulo ndi zida m'mafakitale osiyanasiyana.Ndi kumiza zitsulo derusted zitsulo zinki wosungunuka pafupifupi 500 ℃ kumatira nthaka wosanjikiza pamwamba pa zigawo zitsulo, potero kukwaniritsa cholinga kupewa dzimbiri.Kutentha kwa dip dip galvanizing: kutha ku pickling mankhwala - kutsuka madzi - kuwonjezera plating solution - kuyanika - kupachika plating - kuziziritsa - mankhwala - kuyeretsa - kupukuta - kutsirizitsa kutenthetsa dip galvanizing 1. Kuthira kothira madzi otentha kumapangidwa kuchokera ku njira yakale yothira dip yotentha. , ndipo ili ndi mbiri ya zaka zoposa 170 kuchokera pamene dziko la France linagwiritsira ntchito dip dip galvanizing ku mafakitale mu 1836. M'zaka makumi atatu zapitazi, ndi chitukuko chofulumira chazitsulo zozizira zozizira, mafakitale otentha a dip galvanizing atukuka kwambiri.
Hot dip galvanizing, yomwe imadziwikanso kuti hot dip galvanizing, ndi njira yopezera zokutira zitsulo pazigawo zachitsulo pomizidwa mu zinki wosungunuka.Ndi chitukuko chofulumira cha magetsi othamanga kwambiri, zoyendetsa, ndi mauthenga, zofunikira zotetezera mbali zachitsulo zikuchulukirachulukira, ndipo kufunikira kwa galvanizing yotentha yotentha kukuwonjezeka.

Ntchito zoteteza
Nthawi zambiri, makulidwe a galvanized layer ndi 5 ~ 15 μ m.Kutentha-kuviika malata wosanjikiza zambiri pa 35 μ Pamwamba pa m, ngakhale mpaka 200 μ m. Hot dip galvanizing ali ndi luso lophimba bwino, zokutira wandiweyani, ndipo palibe organic inclusions.Ndizodziwika bwino kuti njira zomwe zinc zimakanira ku dzimbiri mumlengalenga zimaphatikizapo chitetezo cha makina ndi chitetezo cha electrochemical.Pansi pa nyengo ya dzimbiri mumlengalenga, pamwamba pa nthaka wosanjikiza amakhala ndi ZnO, Zn (OH) 2, ndi mafilimu oteteza zinc carbonate, omwe pang'onopang'ono amachepetsa dzimbiri la zinki.Ngati filimu yotetezayi (yomwe imatchedwanso kuti dzimbiri loyera) yawonongeka, idzapanga filimu yatsopano.Pamene nthaka wosanjikiza kuonongeka kwambiri ndi kuyika chitsulo gawo lapansi pangozi, nthaka amapereka electrochemical chitetezo ku gawo lapansi.Mphamvu yeniyeni ya zinc ndi -0.76V, ndipo mphamvu yeniyeni yachitsulo ndi -0.44V.Pamene zinki ndi chitsulo zimapanga batri yaying'ono, zinki imasungunuka ngati anode, ndipo chitsulo chimatetezedwa ngati cathode.Mwachiwonekere, kukana kwamlengalenga kwa mlengalenga kwa kutentha kwa dip galvanizing pazitsulo zachitsulo ndikwabwinoko kuposa electrogalvanizing.
Njira yopangira zinc
The mapangidwe njira yotentha kuviika kanasonkhezereka wosanjikiza ndi ndondomeko kupanga chitsulo nthaka aloyi pakati pa chitsulo gawo lapansi ndi koyera nthaka wosanjikiza kunja kwa Z. chitsulo nthaka aloyi wosanjikiza aumbike pamwamba pa workpiece pa otentha kuviika plating, amene amalola kuphatikiza kwabwino pakati pa chitsulo ndi chitsulo choyera cha zinc.Njirayi ikhoza kufotokozedwa motere: Pamene chitsulo chogwiritsira ntchito chitsulo chimamizidwa mumadzi osungunuka a zinki, zinki ndi nthaka zimapangidwira pa mawonekedwe a α Iron (pachimake) chosungunuka cholimba.Uwu ndi kristalo wopangidwa ndi kusungunula maatomu a zinki pamalo olimba achitsulo choyambira chitsulo.Ma atomu awiri achitsulo amasakanikirana, ndipo kukopa pakati pa ma atomu kumakhala kochepa.Chifukwa chake, zinc ikafika pakuchulukira mu kusungunuka kolimba, ma atomu awiri a zinki ndi chitsulo amafalikira wina ndi mnzake, ndipo maatomu a zinki amagawika mu (kapena kulowetsedwa) mu matrix achitsulo amasuntha mumtambo wa matrix, pang'onopang'ono kupanga aloyi ndi chitsulo. , pamene chitsulo ndi zinki zimagawanika mumadzi osungunuka a zinki ndi zitsulo zamphamvu kwambiri zimapanga intermetallic pawiri FeZn13, yomwe imamira pansi pa mphika wotentha wotentha, kupanga zinki slag.Pamene workpiece imachotsedwa muzitsulo zodulira zinki, pamwamba pake pamakhala wosanjikiza wa zinki, womwe ndi kristalo wa hexagonal.Chitsulo chake sichiposa 0.003%.
Kusiyana kwaukadaulo
Kukana kwa dzimbiri kwa malata otentha ndikokwera kwambiri kuposa kuzizira kozizira (kotchedwa galvanization).Kutentha kotentha sikudzachita dzimbiri m'zaka zingapo, pamene kuzizira kozizira kudzachita dzimbiri m'miyezi itatu.
Njira ya electrogalvanizing imagwiritsidwa ntchito kuteteza zitsulo kuti zisawonongeke."Padzakhala zitsulo zabwino zotetezera m'mphepete ndi pamwamba pa mankhwala, zomwe zimawonjezera gawo lokongola pazochitikazo.Masiku ano, mabizinesi akuluakulu akuchulukirachulukira pazigawo zamagulu ndiukadaulo, chifukwa chake ndikofunikira kusintha ukadaulo pakadali pano. ”