Raws li peb paub, ntawm cov phaj ntawm phaj kub exchanger, titanium phaj yog tshwj xeeb rau nws zoo heev tiv thaiv corrosion. Thiab nyob rau hauv kev xaiv ntawm gasket, viton gasket muaj npe nrov rau kev tiv thaiv acid thiab alkali thiab lwm yam tshuaj. Yog li lawv puas tuaj yeem siv ua ke los txhim kho corrosion ntawm phaj kub exchanger?
Qhov tseeb, Titanium phaj thiab viton gasket tsis tuaj yeem siv ua ke. Tab sis vim li cas? Nws yog lub hauv paus ntsiab lus ntawm corrosion kuj ntawm titanium phaj uas ob yam tsis tuaj yeem siv ua ke, vim tias titanium phaj yog ib qho yooj yim los tsim ib txheej tuab titanium oxide tiv thaiv zaj duab xis rau saum npoo, txheej txheej ntawm oxide zaj duab xis tuaj yeem tsim sai hauv cov pa oxygen- muaj ib puag ncig tom qab kev puas tsuaj. Thiab qhov no tso cai rau kev puas tsuaj thiab kho (repassivation) ntawm oxide zaj duab xis kom tswj tau hauv lub xeev ruaj khov, tiv thaiv cov ntsiab lus titanium hauv kev puas tsuaj ntxiv.
Daim duab pitting corrosion raug
Txawm li cas los xij, thaum titanium hlau lossis alloy nyob rau hauv ib puag ncig uas muaj fluorine, nyob rau hauv qhov kev txiav txim ntawm hydrogen ions hauv dej, cov tshuaj fluoride ions los ntawm viton gasket hnov mob nrog cov hlau titanium los tsim cov fluoride soluble, uas ua rau titanium pitting. Qhov sib npaug ntawm cov tshuaj tiv thaiv yog raws li nram no:
Ti2O3+ 6HF = 2TiF3+ 3H2O
TiO2+ 4HF = TiF4+ 2H2O
TiO2+ 2HF = TiOF2+ H2O
Cov kev tshawb fawb tau pom tias hauv cov kua qaub acidic, thaum cov tshuaj fluoride ion concentration nce mus txog 30ppm, oxidation zaj duab xis ntawm titanium nto tuaj yeem raug rhuav tshem, qhia tias txawm tias cov tshuaj fluoride ion tsawg heev yuav txo tau qhov corrosion kuj ntawm titanium daim hlau.
Thaum titanium hlau tsis muaj kev tiv thaiv ntawm titanium oxide, nyob rau hauv corrosive ib puag ncig uas muaj hydrogen ntawm hydrogen evolution, titanium yuav txuas ntxiv nqus hydrogen, thiab REDOX cov tshuaj tiv thaiv tshwm sim. Tom qab ntawd TiH2 yog tsim nyob rau ntawm titanium siv lead ua nto, uas ua rau kom cov corrosion ntawm titanium phaj, tsim cov kab nrib pleb thiab ua rau cov xau ntawm cov phaj kub exchanger.
Yog li ntawd, nyob rau hauv phaj kub exchanger, titanium phaj thiab viton gasket yuav tsum tsis txhob siv ua ke, txwv tsis pub nws yuav ua rau corrosion thiab tsis ua hauj lwm ntawm phaj kub exchanger.
Shanghai Heat Transfer Equipment Co., Ltd.(SHPHE) muaj kev pab cuam nplua nuj nyob rau hauv phaj kub exchanger kev lag luam, thiab kuj muaj lwm yam lub cev thiab tshuaj lub chaw soj nstuam, uas yuav sai thiab meej txiav txim siab cov khoom ntawm phaj thiab gasket rau cov neeg muas zaub nyob rau hauv thaum ntxov theem ntawm kev xaiv, kom ntseeg tau tias muaj kev nyab xeeb thiab txhim khu kev lag luam ntawm cov khoom siv.
Post lub sij hawm: Feb-17-2022