Puas yog Q355NHA txhawb kub kub - dip galvanizing kho? -} kev paub

1. Qhov txwv: Dab tsi kub -} dip galvanizing tsis tuaj yeem zam

Muaj peev xwm cuam tshuam ntawm Weathering Steel "tus kheej -}} kho" xeb txheej

Q355NHA cov ntsiab lus tseem ceeb yog kev sib sau ua ruaj khov, patina) uas yuav tsum tsis muaj ntev- lub sij hawm tu. Kub - dip galvanizing ntxiv rau cov txheej zinc ntxiv uas ua haujlwm raws li lub cev tsis txaus, nws thaiv cov hlau lub xeb tsim. Thaum lub zinc txheej puas ntsoog (piv txwv li, kos), tus kab mob q355555} Cov tuabneeg sib xyaw ua ke

Thickness txwv rau cov khoom siv nyuaj

Rau q355nha qhov chaw nrog ultra - nyias phab ntsa (<3mm) or sharp corners, the high galvanizing temperature (440–460°C) may cause Thermal deformation(piv txwv li, warping, khoov). Tsis tas li ntawd, txoj hlua nqaim (<5mm) or enclosed cavities in components can trap zinc liquid, leading to uneven coating thickness or internal stress after cooling.

Ntau dua tus nqi vs. "tsis muaj - txheej" siv

Kub -} dip galvanizing ntxiv cov khoom siv (cov nqi zinc) thiab tus txheej txheem. Rau Q355NA siv hauv cov txheej txheem me me hauv ib puag ncig (qhov twg nws cov kev siv sia nyob ib puag ncig thiab muaj nuj nqis} Nws tau ua kom haum xeeb nyob rau hauv ib puag ncig nyuaj (piv txwv li ntug dej hiav txwv.

2. Kev tiv thaiv tseem ceeb: Xyuas kom cov khoom siv tau zoo thiab cov khoom siv

(1) pre - galvanizing kev npaj sib txawv

Q355NHA cov nplaim dej muaj cov nplai, roj, lossis xeb (los ntawm kev cia khoom), uas cuam tshuam ncaj qha cuam tshuam zinc adhesion.

Yuav tsum tshem cov xuab zeb teev: Siv cov kua qaub pickling (15-20% hydrochloric acid) lossis txhaj tshuaj tiv thaiv kom tiav cov oxide txheej {

Defase kom meej: Huv si cov roj stains nrog alkaline cov tshuaj ntxuav (piv txwv li, 5-10 ° C, raws li cov roj yuav repel zinc kua thiab daim xim tsis zoo.

(2) tswj lub galvanizing kub thiab lub sijhawm raus dej raus

Qhov ntsuas kub ntau: Tswj cov da dej zinc ntawm440-460 ° C(Tsis pub tshaj 470 ° C). Kev ntsuas kub dhau heev yuav ua rau Q355NHHNHA cov khoom siv Alloy (CU, fe

Lub sijhawm tshem tawm: Rau Q355NHA daim hlau (3-20m tuab), immeerse rau30-90 vib nas this-} heev ntev yuav thicken cov txheej (nce brittleness), luv heev yuav ua rau nyias, tsis sib luag.

(3) Post - galvanizing txias thiab kho

Qeeb Cua Txias Thaum Pib: Tom qab tshem qhov chaw ntawm cov da dej zinc, txias lawv nyob rau hauv huab cua rau 10-30 vib nas this ua ntej, ces quench hauv dej (60-80 ° C, tsis txias dej). Cov dej txias sai nrog dej txias yuav tsim cov txheej cua sov nruab nrab ntawm zinc txheej thiab q355nha puag hlau, ua rau tawg.

Kho tej yam tsis xws luag: Tshawb xyuas rau liab qab, pinholes, lossis cov kab nrib pleb. Kho cov khoom tsis xws me me nrog zinc - fish nplua nuj (zinc cov ntsiab ≥9%); Rau qhov tsis xws luag, rov - pickle thiab re {4 4}} kov {}}} dua, uas ua rau coating inconsistency).

(4) zam kev tsis sib haum xeeb nrog post - galvanizing ua

Yog Q355Nhanhat cov seem yuav tsum tau khoov, txiav, lossis vuam hlauTom qab galvanizing:

Dab tsi khoov hluav taws xob yuav tsum ≥5x thickness rau kev tiv thaiv coating nrum.

Vuam yuav hlawv tawm ntawm zinc txheej ntawm qhov sib koom ua ke- re- Cov xim nplua nuj los pleev xim rau corrosion tsis kam.

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