| 摘要 |
The invention relates to an alloy for hot-galvanising of steels, especially those which contain silicon. Conventional hot-galvanising of individual components of steel takes place at 440-460 DEG C in a zinc bath, to which small quantities of aluminium are added for the purpose of reducing oxidation, as a rule about 0.005% by mass. Steels which do not contain any silicon can be galvanised at these temperatures and with this zinc composition without any problems. The zinc layer thickness is 50-150 mu m. In silicon-containing steels, however, significantly thicker zinc layers are formed. The invention is based on the object of suppressing, or at least reducing, the increased growth of the zinc layer under the same galvanisation conditions, as far as possible, by suitable additions to the zinc. According to the invention, this is effected by an addition of from 0.1 to 1.0% by mass of antimony and 0.015 to 0.025% by mass of aluminium.
|
