Thaum cov roj-tempered torsion springs yog rhuab thiab quenched nyob rau hauv cov roj, zinc-galvanized springs raug rau cov txheej txheem kub-dip galvanization.Cov txheej txheem no suav nrog kev tso dej rau lub caij nplooj ntoos hlav steel hauv lub vat ntawm zinc molten ntawm qhov kub siab heev.
Ntau tus neeg xaiv zinc-galvanized torsion springs vim lawv qhov zoo kawg nkaus tiv thaiv xeb thiab xeb, ua tsaug ntau rau cov txheej txheem kub-dip galvanization.Dawb los ntawm qhov kev hem thawj tsis tu ncua ntawm xeb tsim, zinc-galvanized springs muab lub neej ntev dua li cov roj-tempered springs.