摘要：鋼鐵材料是應用最廣泛的金屬材料，但是其最顯著的缺點是在大氣中會與氧及水蒸汽等發生反應而受到腐蝕。每年世界上都有相當于年產量百分之三十的金屬制品因為腐蝕而報廢。隨著人類在海洋，航空等領域的不斷發展，對耐蝕鍍層材料的要求也就越來越高。因此，必須尋求經濟而有效的金屬制品防護方法來保證金屬制品的耐腐蝕性能，延長使用壽命。合金化是改善其組織與性能的主要方法。

　　　本文采用掃描電鏡、金相顯微鏡以及能譜儀等手段，研究了合金元素硅、鈦對熱浸鍍Zn-30%Al合金鍍層生長的影響。實驗研究表明：

    在Zn-30%Al熔池中加入1.0%的硅可以減緩鐵鋁之間的放熱反應，有效減薄鍍層厚度；隨著合金元素鈦的加入，改變鐵鋁界面生成合金相的種類。硅、鈦的協同作用能進一步減薄鍍層，加入0.2%Ti時效果較好。

     Zn-30%Al合金浴得到的鍍層成分為FeAl3，Zn-30%Al-1.0%Si合金浴得到的鍍層成分為τ5。

　　　Zn-30%Al-1.0%Si合金鍍層在300s時，開始在τ5H相上出現τ5C相，600s時才出現τ1相。600s時，合金層的成分達到穩定為：(Fe2Al5+τ1)/ FeAl3/(τ5H +τ5C)。

合金鍍層在0-60s之間硅元素對鍍層的生長有明顯的抑制作用，合金鍍層在60s-1200s之間硅元素的抑制作用減弱。

    Zn-30%Al-1.0%Si-x%Ti合金鍍層在反應180s后，鍍層最終組織穩定已經穩定，與Zn-30%Al-1.0%Si合金鍍層最終穩定組織相同。在反應初始階段反應速度最快，反應一段時間后逐漸減慢。

關鍵詞：熱浸鍍，鋅鋁合金鍍層，硅，硅鈦協同作用，生長動力學

Abstract:The steel material is the most widely used metallic materials, but the most significant shortcomings in the atmosphere with oxygen and water vapor react by corrosion. The world each year, equivalent to the annual output of 30 per cent of metal products corrosion scrapped. With the continuous development of human beings in the marine, aviation and other fields, is getting higher and higher requirements for corrosion resistant coating materials. Therefore, we must seek economical and effective protection of metal products to ensure the corrosion resistance of the metal products, extended service life. 

　　　In this paper, Using scanning electron microscope, metallurgical microscope and energy dispersive spectroscopy was studied by means of alloying elements silicon and titanium on the growth of hot dip Zn-30% Al alloy coating. Experimental studies have shown that:

　　　Can slow exothermic reaction between the Fe-Al-Zn-30% Al bath in 1.0% of silicon, effective thinning coating thickness; With the addition of alloying elements titanium, change the type of Fe-Al interface generation alloy phase. Silicon, titanium synergistic effect can be further thinned coating, adding 0.2% Ti better.    Zn-30% Al alloy coating composition bath FeAl3, Zn-30% Al-1.0% Si alloy bath coating composition τ5.    Zn-30% Al-1.0% Si alloy coating in the 300s, began to appear in the τ5H phase τ5C phase 600s when τ1 phase. 600s, the composition of the alloy layer: (Fe2Al5 +τ1) / FeAl3 / (τ5H +τ5C).Alloy coating of silicon between the 0-60s on the growth of the coating significantly inhibited the alloy coating silicon element in the 60s-1200s between the inhibition diminished.    Zn-30% Al-1.0% Si-x% Ti alloy plating reaction 180s after plating the final organizational stability has stabilized, and Zn-30% Al-1.0% Si alloy coating eventually stabilize and organize the same. The fastest speed in the initial reaction stage of the reaction gradually slowed down after a period of reaction.

Keywords:Hot dip, zinc-aluminum alloy coating, silicon, silicon titanium synergy, growth kinetics