Cov xim-xim steel phaj yog pickled tom qab welding. Yog hais tias kev kho mob tsis zoo, nws yuav yooj yim ua rau xim-xim steel phaj kom corroded. Yog li, peb yuav tsum them sai sai rau cov ntsiab lus hauv qab no thaum lub sij hawm tus txheej txheem pickling:
1. Sulfuric acid tseem tuaj yeem siv rau pickling, thiab lub sijhawm pickling yuav tsum tsis txhob siv sijhawm ntev.
2. Oxalic acid rau kev kho kom zoo dua qub, siv cov concentration 1 ~ 2.
3. Tsis muaj zog alkaline degreasing yuav tsum tau siv rau degreasing, thiab nws yuav tsum tsis txhob muaj cov alkali flake. Tus TAL yuav tsum raug tswj nyob ntawm kwv yees li 15 POINT thiab PH yuav tsum tsis pub dhau 13.
4. Lub acidity ntawm zinc phosphating kev kho mob yuav tsum nqa cov kev txwv siab dua, thiab cov concentration ntawm ntsw kho: TA: 35 lossis ntau dua; FA: 1.2AC: 8 (20CC fermentation tube).
5. Xaj nruab nrog 1-2 sodium carbonate tom qab xaiv.
6. Nws tsis tsim nyog los ntxuav cov xim-coated steel phaj thiab ua kom nws dhau.
