1. Thaum twg yuav rov thov dua
Cov txheej yuav nkig, tawg, los yog tev tawm, nthuav tawm cov hlau tshiab.
Cov kab xeb hauv cheeb tsam tshwm sim thiab kis dhau qhov kov me me -ups.
Qhov saum npoo poob nws cov yeeb yaj kiab tiv thaiv zoo ib yam (xws li, fading, chalking hauv UV- qhov chaw raug).
Kev tshuaj xyuas niaj hnub (6-12 lub hlis) paub meej tias txo cov kev tiv thaiv corrosion (xws li, xeb cov ntaub ntawv sai sai tom qab los nag).
2. Qhov tseem ceeb ua ntej-Cov kauj ruam rov ua dua
Tshem tawm cov txheej qub & xoob xeb: Siv cov txhuam txhuam los yog 80-120 grit sandpaper los txhuam cov txheej txheej txheej, flaky xeb, thiab cov kab mob. Rau thaj chaw loj, lub teeb abrasive blasting (0.3-0.5 MPa) yog qhov ua tau zoo.
Degrease & huv: So lub ntsej muag nrog lub degreaser (isopropyl cawv lossis dej-raws li kev lag luam degreaser) kom tshem tawm cov roj, plua plav, thiab cov khoom seem. Yaug (yog tias dej-raws li) thiab qhuav tag.
Neutralize yog tias xav tau: Yog tias muaj cov xeb hnyav los yog cov kua qaub seem ntawm cov txheej qub, siv cov tshuaj alkaline tsis muaj zog (2% sodium bicarbonate) los ua kom tsis zoo, tom qab ntawd yaug thiab qhuav.
3. Cov txheej txheem rov ua dua
Xaiv tib Q355NH-txhim kho xeb txheej txheej (cov qauv tsim ua kom muaj kev sib raug zoo).
Siv cov yeeb yaj kiab ntub dej tsis sib xws (50-100 μm) los ntawm kev txau, txhuam, lossis dov- zam qhov tsis sib xws.
Siv nyob rau hauv ib puag ncig tsim nyog (10-35 degree, av noo<85%) and allow full curing (24–48 hours) before exposing to moisture.
Txhawm rau kom muaj kev ruaj ntseg zoo dua, rov ua cov txheej txheem ua pa (silicone-acrylic lossis fluoropolymer) rov qab siv cov txheej txheem hloov pauv.
4. Cov Lus Cim Tseem Ceeb rau Kev Thov Rov Ua Dua
Tsis txhob muab cov khaubncaws sab nraud povtseg: Tsis txhob siv cov txheej txheem tshiab los ntawm cov txheej qub qub qub -qhov no ua rau tsis zoo adhesion thiab bubbling. Tsuas yog rov ua dua rau thaj chaw uas cov txheej txheem qub tau ua tsis tiav, lossis strip tag nrho saum npoo rau kev rov ua dua tshiab (rau kev degradation thoob plaws).
Txwv lub sij hawm reapplication: Cov hlau nto yuav maj mam nyias nrog rov sib tsoo (rau prepping). Rau cov txheej txheem tseem ceeb, txwv kev rov ua dua tshiab rau 2-3 zaug; Tsis tas li ntawd, xav txog kev hloov qhov chaw lossis siv cov txheej txheem ntau dua (xws li galvanizing + xim).
Match curing tej yam kev mob: Xyuas kom lub sij hawm rov qab kho dua yog kev tiv thaiv los ntawm kev puas tsuaj thiab ya raws - pom ntxov ntxov yuav txo cov kev ntseeg ntawm zaj duab xis.
