1. Cov kev xav tau ntawm Core Compatibility (Tsis yog-Negotiable)
Patina kev koom ua ke: Cov txheej yuav tsum tsis txhob hnov qab nrog Q355NH cov xeb patina uas twb muaj lawm (suav nrog goethite / lepidocrocite). Tsis txhob coatings nrog cov kuab tshuaj muaj zog (xws li, siab -VOC alkyds) uas yaj los yog ua kom cov patina.
Ua pa: Xaiv cov qauv "ua pa" (acrylic, silicone, fluoropolymer) uas tso cai rau cov dej noo thiab vapor kom dim. Tsis yog- cov coatings breathable (xws li, tag nrho cov epoxy) ntxiab ya raws nyob rau hauv zaj duab xis, ua rau blistering thiab localized corrosion.
Tsis cuam tshuam nrog tus kheej -Kev tiv thaiv: Cov txheej yuav tsum tsis txhob thaiv lub patina lub ntuj tus kheej - kho muaj peev xwm. Tsis txhob hnyav, nruj txheej uas tiv thaiv lub patina los ntawm kev hloov mus rau ib puag ncig kev hloov pauv.
2. Kev ua tau zoo los ntawm Kev Ua Haujlwm
Corrosion Resistance:
Rau ib puag ncig me me (hauv tsev, qis- av): Cov tsho tiv no yooj yim breathable ntshiab los yog xeb hloov txheej txheej (tannic acid/phosphoric acid-raws li) txaus.
Rau nruab nrab / hnyav ib puag ncig (sab nraum zoov, kev lag luam, ntug dej hiav txwv): Xaiv cov coatings nrog cov tshuaj tiv thaiv -cov xim corrosive (piv txwv li, hlau oxide, zinc phosphate) lossis cov khoom siv txiab txiab los tiv thaiv chlorides thiab sulfur dioxide.
Adhesion: Yuav tsum khi nruj rau ob qho tib si patina thiab cov hlau tshiab (txiav npoo). Ua ntej txheej txheej nrog zoo ntub adhesion- xeem dhau ntawm - txiav adhesion xeem (ASTM D3359) kom tsis txhob tev.
Abrasion & Huab cua Resistance:
Cov ntawv thov sab nraum zoov yuav tsum muaj UV ruaj khov los tiv thaiv kom tsis txhob ploj los yog chalking (xaiv acrylic lossis fluoropolymer topcoats).
Rau siab -cov cheeb tsam hnav (xws li, cov qauv pob qij txha), xaiv cov txheej nrog cov cwj mem hardness Ntau dua lossis sib npaug li 2H los tiv thaiv khawb.
3. Environmental & Application Requirements
Tsawg Ib puag ncig cuam tshuam: Ua raws li cov qauv ntsuab (xws li EU RoHS, Tuam Tshoj GB/T 23985) los ntawm kev zam cov hlau hnyav (chromate, lead) thiab siab -VOC cov kuab tshuaj. Dej-raws li lossis qis-VOC formulations yog nyiam.
Application Adaptability:
Tau tshaj txoj kev siv ntau yam (txhaj tshuaj, txhuam hniav, dov) rau ob qho tib si ntawm -qhov chaw thiab lub Hoobkas siv.
Lub sij hawm ziab yuav tsum ua raws li cov phiaj xwm phiaj xwm-xav tau cov txheej txheem uas kho tau ntawm qhov kub thiab txias (10–35 degree) yam tsis muaj cov cuab yeej tshwj xeeb.
Kub Resistance: Nrog rau qhov kev pabcuam ib puag ncig qhov kub thiab txias (-20℃txog 60℃rau feem ntau cov ntawv thov sab nraum zoov) tsis tawg lossis tev.
4. Formulation -Specific Requirements
Ntshiab Coatings: Yuav tsum tau pob tshab los khaws cov patina lub ntuj zoo nkauj. Xaiv rau silicone-acrylic hybrids rau kev sib npaug ua pa thiab ua haujlwm ntev.
Rust Conversion Coatings: Muaj cov khoom xyaw reactive (tannic acid, phosphoric acid) uas tsim ib daim duab ntom ntom, inert zaj duab xis nrog cov hlau nto. Tsis txhob muaj acidic formulations nrog pH<2 (risk of over-corrosion).
Xim -Cov Txheej Txheem Sib Txuas (rau pom cov npoo): Pigments yuav tsum ua raws li Q355NH's patina (reddish-xim av rau maub grey) thiab tiv thaiv fading. Xaiv cov huab cua steel- tshwj xeeb topcoats nrog hlau oxide pigments rau xim sib xws.
5. Zam hom txheej txheej tsis sib xws
Ua kom pom tseeb ntawm:
Tag nrho cov epoxy los yog polyurethane txheej (tsis yog - breathable, ntxiab ya raws).
Generic carbon steel coatings (tsis yog tsim rau patina compatibility).
High -chloride los yog siab - cov kuab tshuaj coatings (ua puas lub patina thiab ua kom corrosion).
