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通过对铝合金牲牺阳极的微观组织及其腐蚀形貌的考察 ,表明合金的微观组织对其腐蚀溶解有直接关系。由于合金元素富集于晶界及弥散相造成合金组织的不均匀性 ,直接造成其腐蚀的不均匀 ,降低铝合金牺牲阳极的效率。为此熔炼铝合金阳极时必须避免这样组织的合金 ,以保证牺牲阳极的保护作用。
By examining the microstructure and corrosion morphology of the sacrificial sacrificial anode, the microstructure of the alloy is directly related to its corrosion and dissolution. Due to the enrichment of the alloying elements in the grain boundary and the dispersion phase, the heterogeneity of the alloy structure is directly caused by the corrosion of the alloy and the efficiency of the sacrificial anode of the aluminum alloy is reduced. For this purpose, an alloy of such structure must be avoided when melting the aluminum alloy anode in order to ensure the sacrificial anode protection.