Ni ubuhe bwoko bw'amabara atwikiriye Aluminiyumu Irwanya Ingese no Kugabanuka Gukoreshwa Mubidukikije Binyunyu-Binyanja?

Ibisobanuro

Ibidukikije byumunyu mwinshi biranga spray yumunyu, imirasire ikabije ya ultraviolet (UV), ubuhehere bwinshi hamwe nubundi buryo bwumye bwumutse, butera ingese yihuta cyane, igishishwa cyibara ryamabara hamwe namabara agabanuka kumirongo isanzwe ya aluminiyumu. Iyi ngingo irasesengura gahunda yuburyo bwo kwangirika kw ibidukikije, igereranya inzira nyamukuru ya aluminium alloy substrate hamwe na sisitemu yo gutwikira ibinyabuzima, ikanagaragaza ubwoko bwiza bwibara ryibara ryibara rya aluminiyumu hamwe nigihe kirekire cyo kurwanya ingese no kurwanya gushira. Ibijyanye na ASTM yumunyu hamwe namakuru yikizamini cyikirere yavuzwe kugirango ashyigikire umurongo ngenderwaho wo gutoranya ibikoresho byububiko bwinyanja, ibyambu n’ibikoresho byo mu nyanja.

1. Uburyo bwo kwangirika no kuzimangana mu turere twinshi two mu nyanja

1.1 Ingese iterwa n'amashanyarazi

Gutera umunyu wo ku nkombe urimo ibice 3% kugeza kuri 5% bya sodium ya chloride ya sodium ifatanye cyane na aluminiyumu. Utwo duce dukurura ubuhehere buturuka mu kirere kugirango dukore firime ya saline electrolyte. Aluminium substrate ikorwa na anode muri iyi electrolyte, igatera kwangirika kwaho aho kuba ingese imwe. Bitandukanye n'ibyuma bya karubone, imirongo ya aluminiyumu ni gake itanga ingese zitukura ariko ikora ifu yera ya aluminium hydroxide yangirika, yangiza uburinganire bwimiterere kandi ikavunika. Dukurikije ibizamini byo gutera umunyu ASTM B117, imirongo 1000 ya aluminiyumu itunganijwe neza ikura imyanda igaragara nyuma yamasaha 700 gusa yo gukomeza gutera umunyu.

1.2 UV itwarwa na coating igenda ishira

Amazi yo mu nyanja agaragaza hejuru ya 40% y'imirasire y'izuba UV, bikuba kabiri imirasire ya UV ku bikoresho bigaragara ku nkombe. Ubusanzwe polyester itwikiriye iminyururu ya molekile irimo ester idahindagurika, ivunika munsi ya UV irrasiyo. Ibi biganisha ku kunanirwa gukurikiraho bitatu: gutwikisha ibishishwa, kubora kwa pigment no kurangi kw'ibara. Mu turere dushyuha two mu turere dushyuha, polyester isanzwe yometse kuri aluminiyumu itakaza ibice birenga 30% byuzuyemo ibara ryambere mugihe cyimyaka 5, iherekejwe na microscopique yamenetse ituma ion yumunyu yinjira muri substrate ya aluminium.

2. Guhitamo Anti-Rust Aluminium Substrate yo Gukoresha Inkombe

Imikorere yo gutwikira ntishobora gukuraho inenge zidasanzwe, bityo aluminiyumu yo mu nyanja yo mu nyanja ni itegeko kuri siyariyeri nyinshi. Ibice bitatu byingenzi byingenzi byagereranijwe hepfo:

2.1 5052 Al-Mg ivanze (substrate-yambere-substrate)

Umuti wa 5052 urimo 2,2% -2.8% magnesium na munsi ya 0.1% y'umuringa. Umuringa muke ukuraho ingaruka zo kwangirika kwa galvanike ahantu h'umunyu, mugihe magnesium iteza imbere gukora firime yuzuye ya pasiporo ya oxyde yuzuye kuri aluminium. Ubushyuhe bwa H32 na H34 buringaniza ubukana bwimiterere no kugonda, bikwiranye no gutunganya aluminiyumu. Imibare yo mumurima yerekana 5052 ya aluminiyumu idafite isanduku irwanya kwangirika kwumunyu mumasaha arenga 2000, bikubye gatatu uburebure bwa 3003 ya aluminiyumu.

2.2 Substrat zujuje ibyangombwa kugirango wirinde

1060 ya aluminiyumu ifite intege nke za firime kandi ihindagurika vuba muri spray yumunyu. 6061 aluminiyumu irimo inyongeramusaruro nyinshi z'umuringa, zihutisha kwangirika kw'amashanyarazi iyo ihuye na ion ya chloride yo ku nkombe. Byombi birabujijwe kugaragara kumurongo wamabara ya aluminiyumu yometse kumurongo kandi birashobora gukoreshwa gusa mububiko bwimbere bwimbere.

3. Kugereranya Sisitemu yo Kurwanya Kurwanya Kurwanya

Hashingiwe kuri AAMA 2603/2604/2605 ibipimo ngenderwaho byubatswe, sisitemu eshatu zingenzi zo gutwikira coil zirasuzumwa kubikorwa byo kurwanya ingese no kurwanya gushira:

3.1 PVDF (Polyvinylidene Fluoride) itwikiriye: gutwikira neza ku nkombe

Ubucuruzi bwa 70/30 PVDF (70% fluoropolymer resin + 30% acrylic adhesive resin) ifite imiyoboro ihamye ya karubone-fluor ya covalent hamwe ningufu zingirakamaro zirenze kure ingufu za UV fotone, irinda urunigi rwa molekile. Ikoti risanzwe-amakoti abiri-yatetse PVDF yuzuye hamwe nuburebure bwa 25-28 mkm harimo primer ya chromate idafite primer hamwe na fluorocarbon topcoat. Kwipimisha umunyu bigenzura zeru substrate ingese hamwe no gutwikira nyuma yamasaha 5000 yo gukomeza guhura. Nyuma yimyaka 25 yo hanze yinyanja igaragara, itandukaniro ryamabara ΔE iguma munsi ya 2.0, yujuje ibyangombwa birwanya kurwanya. Yemejwe na AAMA 2605, urwego rwohejuru rwo hejuru yinyanja.

3.2 SMP (Silicone Modified Polyester) igipfundikizo: urwego rwo hagati rwikingiye kuruhande rwinyanja

SMP yongeyeho silikone monomers kuri polyester isanzwe kugirango irusheho kurwanya UV. Ubuzima bwumurimo bugera kumyaka 12-15 mubice bikingiwe ninyanja hamwe nu muti wumunyu utaziguye. Nyamara, umunyu wacyo urwanya imipaka: utezimbere ibishishwa byaho nyuma yamasaha 2200 yo kugerageza gutera umunyu, ntabwo rero ushobora gukoreshwa hejuru yumuyaga ugaragara kumuyaga.

3.3 PE (Polyester Yera): gusa kubwimbere cyangwa gukoreshwa neza

PE coatings iranga ikiguzi gito nigikorwa cyiza cyo kugonda ariko ikirere kibi. Mu bidukikije byo ku nkombe z'umuyaga, kugabanuka kugaragara bibaho mu myaka 3-5, kandi ion zumunyu zinjira mu cyuho cyo gutwikira kugirango zivemo substrate. Ntabwo byemewe kubintu byose byerekana umunyu mwinshi.

4. Ibisobanuro bisabwa Ubwoko bwibicuruzwa

Ibara ryonyine ryahujwe na aluminiyumu yujuje ibisabwa igihe kirekire cyo kurwanya ingese ndetse no kurwanya kugabanuka ku bidukikije byo ku nkombe z’umuyaga mwinshi ni 5052-H32 ya aluminium substrate hamwe namakoti abiri atetse PVDF . Ibipimo birambuye bya tekiniki birasanzwe kuburyo bukurikira:

• Substrate: AA5052-H32 ya aluminiyumu, uburebure bwa mm 0.4-2.0 mm, yujuje ubuziranenge bwa EN 485

• Kwiyitirira isura: Kuvura Chromate idafite uburyo bwo kuvura kugirango yongere igifuniko kandi irwanya ruswa

• Imiterere yo gutwikira: 5-8 μm epoxy anti-ruswa primer + 20 μm PVDF topcoat, impande zombi

• Ibipimo byerekana: Amasaha 5000+ atabogamye yumunyu utera, ΔE≤1.8 itandukaniro ryamabara nyuma yimyaka 10 yihuta yikizamini cyikirere

5. Amabwiriza yo Kwishyiriraho no Kubungabunga

Ndetse PVDF yujuje ibyangombwa isize 5052 ya aluminiyumu ihura n'ingaruka zo kwangirika mugukata impande zombi. Kubaka ahabigenewe bigomba gufata kashe yo gufunga ibice byose byaciwe kugirango ibuze umunyu ion. Guhura nicyuma cya karubone bigomba gukoresha gasketi ya nylon kugirango wirinde kwangirika. Kubungabunga umurongo bisaba gusa amazi meza yumwaka kugirango akureho imyunyu ngugu, nta gusiga irangi bikenewe mumyaka 20.

6. Umwanzuro

Mubidukikije byumunyu mwinshi hamwe na UV ikomeye hamwe nu muti wumunyu, ibisanzwe bisanzwe PE na SMP ibara ryometseho aluminiyumu ntishobora guhura nigihe kirekire cyo kurwanya ingese no kurwanya gushira. Ihuriro rihujwe na marine-5052-H32 aluminium alloy substrate hamwe na AAMA 2605 yemejwe amakoti abiri-abiri-yatetse PVDF itanga igihe kirekire. Kubikoresho byubufasha bwinyanja bikingiwe nubushyuhe buke, SMP yatwikiriye imirongo ya aluminiyumu 5052 nubundi buryo buhendutse, mugihe ibicuruzwa bitunganijwe neza bya polyester bigomba kuvaho kurutonde rwibikoresho byo ku nkombe burundu.