Kumberi uye kumashure mativi e pcb redunhu ndiwo maturusi emhangura. Mukugadzira pcb masekete, zvisinei kuti mhangura yemhangura inosarudzwa kuti ishanduke mutengo wehuwandu kana kaviri-manhamba yekuwedzera uye kubvisa, mhedzisiro yekupedzisira inzvimbo yakatsetseka uye yekuchengetedza-isina. Kunyange zvazvo zvinhu zvemuviri zvemhangura zvisingafari sealuminium, iron, magnesium, nezvimwewo, pasi pemamiriro echando, mhangura yakachena uye okisijeni zvinonyanya kukanganiswa neoxidation; tichifunga nezvekuvapo kweco2 uye mhute yemvura mumhepo, pamusoro pemhangura yose Mushure mekubatana negesi, redox reaction ichaitika nokukurumidza. Tichifunga kuti ukobvu hwemhangura yemhangura muPCB yedunhu yakanyanya kutetepa, iyo mhangura mushure memhepo oxidation ichava quasi-yakadzikama mamiriro emagetsi, izvo zvinokuvadza zvakanyanya maitiro emagetsi emagetsi ese PCB maseketi.

Kuti zviri nani kudzivirira oxidation yemhangura, uye kuti nani kupatsanura welding uye asiri-welding welding zvikamu zvePCB redunhu panguva yemagetsi welding, uye kuitira kuchengetedza zviri nani pamusoro peiyo pcb redunhu, michina mainjiniya akasika rakasiyana Architectural. Coatings. Mavara ekuvaka akadaro anogona kubhurwa zviri nyore pamusoro pePCB wedunhu, zvichikonzera kuwanda kwechidziviriro chekudzivirira chinofanira kunge chakatetepa uye chichivharira kusangana kwemhangura uye gasi. Iyi layer inonzi mhangura, uye iyo mbishi inoshandiswa ndeye solder mask