1. Tej yam tseem ceeb cuam tshuam rau lub neej ua haujlwm
Ib puag ncig hnyav:
Ib puag ncig me me (hauv tsev, qis- thaj chaw nyob deb nroog): Cia li 5–8 xyoo (qee zaum 10+ xyoo) vim tias cov av noo thiab cov pa phem tsis txaus.
Ib puag ncig nruab nrab (nrog rau sab nraum zoov, tsis yog{0}} thaj chaw muaj kev lag luam ntug hiav txwv): 3-5 xyoo, nrog maj mam hnav los ntawm nag thiab kub hloov.
Ib puag ncig hnyav (ntev ntsev tsuag tsuag, siab- thaj chaw muaj sulfur, dej nag hnyav): 2-3 xyoos, raws li chlorides thiab acids ua rau txheej txheej degradation.
Daim ntawv thov zoo:
Kev npaj txhij txhua (tag nrho tshem tawm ntawm oxide nplai, roj, thiab HAZ) thiab txawm tias daim ntawv thov txheej txuas ntxiv kev pab cuam lub neej los ntawm 30-50%.
Shoddy prep (cov kab mob seem) los yog txheej tsis sib xws ua rau ntxov tev, shortening lub neej mus rau 1-2 xyoo.
Txheej hom:
High- zoo huab cua steel- cov converters tshwj xeeb (tannic acid + phosphoric acid composite formulas) kav ntev li 2-3 npaug ntawm cov khoom siv xeb.
2. Kos npe rau txheej txheej xav tau rov thov dua
Cov txheej yuav nkig, tawg, los yog tev tawm, nthuav tawm cov hlau tshiab.
Cov kab xeb hauv cheeb tsam tshwm sim ntawm cov npoo kho thiab maj mam kis mus.
Qhov saum npoo poob nws cov yeeb yaj kiab tiv thaiv tsis sib xws thiab qhia tias tsis sib xws.
3. Cov lus qhia kom ncua sij hawm ntev
Siv lub tsho zoo nkauj ua pa (acrylic lossis silicone-raws li) rau ntawm cov txheej txheem hloov dua siab tshiab los thaiv cov pa phem thaum tso cai rau ya raws.
Tshawb xyuas txhua xyoo nyob rau hauv ib puag ncig hnyav thiab kov cov chaw me me puas sai sai.
Tsis txhob cuam tshuam ncaj qha nrog cov tshuaj corrosive (txoj kev ntsev, pob zeb ua dej ntws, cov tshuaj muaj zog).
