成都耍快餐2020

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專業提供鋁外殼型材、擠壓、CNC精密加工、氧化一站式鋁材制造服務型企業
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鋁為什么要進行表面處理?

時間:2018-09-03瀏覽次數:948 作者:頂泰鋁業

鋁是具有銀白色光澤的輕金屬,其耐蝕性具有以下兩個特點:


  1、純度越高,耐蝕性越好,眾所周知,純鋁在空氣之中與氧氣發生作用,在鋁的表面會生產一層很薄的致密自然氧化膜,比其它金屬氧化膜生成的快而且厚的多,從而阻止了空氣中有害氣體和水分的腐蝕,起到了保護作用;


  2、純鋁的耐蝕性雖好,但機械強度差,這在一定程度上制約了鋁的應用,因此,人們在鋁中加入適量的鎂、銅、鋅等其他金屬,制成各種類型的鋁合金,鋁合金的機械強度高,使鋁的機械強度大大提高,應用范圍大大擴大,鋁合金雖機械強度高,但耐蝕性比純鋁差,因此就有可能因氧化而受腐蝕。這就需要進行粉末涂裝對鋁型材加以保護,鋁合金以其比重小、易加工,機械強度大等特點

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成都耍快餐2020
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