Anti-corrosion epoxy powder yokutira imagwira ntchito yoteteza

Kugwiritsiridwa ntchito kwa chitetezo cha cathodic ndi chitetezo cha dzimbiri, kumapangitsa kuti pansi pa nthaka kapena pansi pa madzi zitsulo zikhale zotetezeka kwambiri komanso zothandiza. Nthawi zambiri yokutidwa ndi ❖ kuyanika zoteteza pamaso ntchito, kwa zitsulo ndi dielectric chilengedwe magetsi kutchinjiriza kudzipatula, ❖ kuyanika wabwino akhoza kuteteza oposa 99% ya nyumba kunja dzimbiri. Chitoliro ❖ kuyanika mu kupanga, zoyendera ndi kumanga, sangatsimikizire mwamtheradi kuwononga chilichonse (kudzazani ❖ kuyanika pakamwa, kachulukidwe ❖ kuyanika, ❖ kuyanika pinhole, etc.), sikutheka kuti dzimbiri dzimbiri chilengedwe olekanitsidwa. Komanso kwa odana ndi dzimbiri kutchinjiriza wosanjikiza wa zipangizo zosiyanasiyana, mosiyanasiyana, kuyamwa ndi mpweya, ndipo pang'onopang'ono m'manda kuyamwa. Kuti mukhalebe odana ndi dzimbiri, ndikofunikira kutenga chitetezo cha cathodic, chomwe ndi chitetezo cholumikizana. zokutira wandiweyani (makhuthala> 1mm), payipi chitetezo olowa ayenera kusankhidwa kuthekera chitetezo cha -1.10 kuti-1.15V (CSE), ≤ ≤ 1mm ≤ ≤ 1.05 mm) chitetezo angathe -1.10-XNUMXV (CSE), Poganizira kapangidwe ka dothi, chinyezi, kutentha, mitundu yokutira, mtundu wa ❖ kuyanika, komanso tizilombo tating'onoting'ono, kusintha koyenera pakutetezedwa, zonse kuteteza payipi popanda kuwononga zokutira zotsutsana ndi dzimbiri. Kuwonongeka kwa malo owunikira polarization ndikothandiza kwambiri. "Chitetezo" ndi lingaliro lofunikira pano, lomwe anti-corrosion epoxy ufa wophimba m'malo mwake, "chitetezo"?

Kuvula kwa cathode, zowononga, payipi yachitsulo yokwiriridwa kuti igwiritse ntchito chitetezo chabwino kwambiri chotetezedwa cha cathodic (3PE coating, kuphatikizika kwa epoxy powder) pazifukwa zoyenera kuzifufuza. Za kuthekera kwachitetezo chabwino kwambiri. Pakalipano wokhotakhota mwa akatswiri akunja amaphunzira za dzimbiri ndi chitetezo cha cathodic, mphamvu ya hydrogen desorption reaction yamphamvu ya-1.15V. Malinga ndi kafukufuku ku Malaysia, Register ya Lloyd, Shell imapereka chitetezo chokwanira cha-1.1V malire take-1.15V; German muyezo DIN30676-19853.1 amawerenga motere: mu ❖ kuyanika woonda (<1mm) wandiweyani anagwiritsidwa ntchito dzimbiri kuteteza mlanduwo, chifukwa polarization adzakhala ndi zotsatira zosiyana monga matuza anapanga, pofuna kuchepetsa zotsatira, ayenera kuchepetsa kukula kwa kuthekera kwachitetezo monga ntchito ya zokutira, monga chitetezo chokwanira -1.00 ~~-1.20V (CSE wachibale) . Kunja, makamaka zomwe zingayambitse kulephera kwa ❖ kuyanika ndi zinthu zingapo, kuphatikizapo mapangidwe a nthaka, chinyezi, kutentha, mitundu yokutira, khalidwe lakuya ndi tizilombo toyambitsa matenda, jini yamakampani.ralzimaganiziridwa kuti zipewe kutha kwa magetsi -1.05 ~ - 1.10V (CSE) (Zindikirani: kufala kwa kuphatikizika kolumikizidwa ndi epoxy powder zokutira). Kuphimba kwa Cathodic Chitetezo (3PE yophimba pansi kuchokera pamakina a maphatikizidwe omangika epoxy ufa wokutira).

❖ kuyanika mtundu, chinyezi, kutentha limatsimikizira ❖ kuyanika mayamwidwe madzi, kukana malowedwe luso mu ntchito ya ❖ kuyanika makulidwe ndi ❖ kuyanika pansi pa zinthu zomwezo. Kafukufuku wasonyeza kuti cross-linked epoxy resin imapanga kuchuluka kwa pore ndi pore ngalande za mamolekyu amadzi kulowa mu epoxy resin. Yankho kufika ❖ kuyanika / zitsulo mawonekedwe, kuchokera mumphangayo mu dzimbiri mankhwala filimu kwaiye pa mawonekedwe ndi anachita zitsulo, wosanjikiza wa dzimbiri mankhwala filimu kupewa zimene zitsulo ndi yankho, ndi ❖ kuyanika kukana amachepetsa pang'onopang'ono. Ndi ma ion ochulukirachulukira omwe amafika pachimake, filimu iyi ya corrosion product imawonongeka pang'onopang'ono, dzimbiri zimakula kwambiri, ndipo pamapeto pake zimapangitsa kuti zokutira za epoxy zichotsedwe m'ng'oma. Fusion zomangira epoxy ufa zokutira wochiritsidwa akadali wolemera mu etha ndi hydroxyl magulu, magulu yogwira ntchito ndi chitoliro pamwamba zomangika pamodzi ndi zomangira mankhwala kupanga ❖ kuyanika odana ndi dzimbiri. Lembani pakamwa pa ❖ kuyanika, wandiweyani, pinhole zifukwa, ❖ kuyanika ndi madigiri osiyana a mayamwidwe madzi ndi permeability, ngati cathodic chitetezo ndi mopambanitsa, chifukwa cathodic hydrogen kusanduka, ndi yogwira maatomu wa haidrojeni anasonkhanitsa, kumlingo wakutiwakuti. , haidrojeni idzakhala ether ndi hydroxyl reaction, potero imasokoneza mphamvu ya mgwirizano wa zokutira ndi chitoliro chachitsulo, zomwe zimapangitsa kuti mphamvu zomangira ziwonongeke. Chotsatira chake ndikuti ❖ kuyanika kuchokera ku chitoliro chachitsulo.