Tshuaj lom neeg muaj pes tsawg leeg ntawm Secc (elecolytic chromate - Coated (txias- txheej txheem (zinc + automate). Cov hauv qab no yog ib qho kev txheeb xyuas kev siv tshuaj lom neeg:
1. Cov khoom siv hauv paus (txias - rolled steel, xws li SpCC / Jis G 3141)
Cov khoom siv hauv paus rau SECC feem ntau tsawg -} paab khob cold- rolled steel ntawv (xws li SpCC). Nws cov tshuaj muaj kuab lom (feem pua loj, wt%) yog kwv yees li hauv qab no:
Keeb ntsiab lus ntau (wt%) muaj nuj nqi
C (carbon) 0.02-0.15% cuam tshuam lub zog thiab hardness; Tsawg cov pa hluav taws xob txhim kho kom muaj kev muaj peev xwm.
Mn (manganese) 0.10-0.60% Nce lub zog thiab txhim kho kub dov lub zog.
P (Phosphorus) tsawg dua lossis sib npaug rau 0.03% nce lub zog, tab sis ntau dhau ntawm cov nyiaj txo qis.
S (Sulfur) tsawg dua los yog sib luag rau 0.03% impurity lub caij, cuam tshuam rau weldability thiab stamping khoom.
Si (silicon) tsawg dua lossis sib npaug rau 0.10% deagidizer; me me yog tam sim no.
Al (Aluminium) 0.02-0.07% deoxidizes thiab reepines nplej.
Fe (Hlau) Tshuav Tshuav Cov Khoom Siv Loj
Nco tseg: cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov qib sib txawv (piv txwv li, spcc, spce, thiab siab {2} {} lub zog hlau) sib txawv; Thov saib cov qauv tshwj xeeb (piv txwv li, jis g 3141).
2. Electrolytic Zinc Txheej
Secc yog coated nrog txheej txheej ntawm ntshiab Zinc (ZN). Lub cev hnyav yog feem ntau 10-40 g / m² (ib tog). Lub ntsiab muaj pes tsawg leeg:
ZN: Ntau dua los yog sib npaug rau 99.9%
Tej zaum yuav muaj cov nqi ntawm cov impurities xws li PB (txhuas) thiab FE (hlau) (nyob ntawm cov txheej txheem galvanizing).
3. Chromate Txheej
Secc undergoes ib chromate passivation kev kho mob los txhim kho corrosion tsis kam. Raug pes tsawg leeg:
CR (chromium): muaj li cr³⁺ (troment chromium) lossis CREXAVALENT Chromium, ib puag ncig kev txwv).
Tej zaum yuav muaj cov khoom xyaw xws li cov khoom xyaw xws li phosphates (pauj) thiab silicates (silicates (sitoment).
Cov kev hloov kho ib puag ncig: Kev Seccs niaj hnub siv chromium {}}} dawb los hloov cov roj ntsha hoxavalent chromium (txwv los ntawm RoHS / cuag cov kev cai / ncav tes).
4. Raug Secc chemical piv txwv piv txwv (siv)
Ntsiab lus hauv paus (Spcc) Galvanized Txheej Chromate Txheej
FE ~ 98.5%<0.1% Trace
C 0.02-0.15% - -
MN 0.10-0.60% - -
Zn - Ntau dua lossis sib npaug nrog 99.9% -
Cr - - 0.1-1.0 mg / m² (li cr)
5. Lwm tus qauv
JIS G 3313 (Secc)
JIS G 3141 (Spcc, Txias - rolled cov khoom)
ASTM A653 (Txheem rau galvanized steel ntawv)