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一、复习目标1．了解铁的物理性质；生铁和钢的成分及机械性能的主要差异；空气和水分对钢铁生锈的影响及防锈的方法。2．应用铁的化学性质。二、知识网络目前已发现金属SO余种，分为黑色金属和有色金属两大类f其中铁、8、信是黑色金属，其余均为有色金属。铁及其合全的有关知?
First, review the goal 1. Understand the physical properties of iron; the main differences between the composition and mechanical properties of pig iron and steel; the effect of air and moisture on the rust of steel and the method of preventing rust. 2. Apply the chemical properties of iron. Second, the knowledge network has now found that more than metal SO, is divided into two major categories of black metal and non-ferrous metal f iron, 8, letter is black metal, the rest are non-ferrous metals. Iron and its related knowledge?