Zinc alloy for zinc bath iron control hot dipping

The invention provides a zinc alloy for zinc bath iron control hot dipping, which comprises 0.005-0.02 wt.% of Ga, 0.01-1.2 wt.% of Si and the balance of Zn, Al and inevitable impurities on the basis of the total mass of the zinc alloy for zinc bath iron control hot dipping. A proper amount of Ga and Si are added into a zinc bath of a zinc-aluminum alloy, and a trace amount of Ga promotes the Si and free Fe in the zinc bath to be better combined to enter a slag phase, so that the purpose of controlling iron in the zinc bath is achieved, and the zinc alloy for controlling iron in the zinc bath is suitable for steel materials with various complex components and complex shapes; the iron content in the zinc bath can be effectively controlled to be kept at a low level in the hot-dip process, so that the liquidity of the zinc bath is improved, the thickness of a plating layer is reduced, meanwhile, the adhesive force of the plating layer can be increased, and the plating layer has high quality. 本发明提供一种锌浴控铁热镀用锌合金，以该