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zn-55%al-si合金镀层钢丝在海水中的耐蚀性能

Keywords: 材料失效与保护

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Abstract:

?建立了“极化-弛豫-阻抗测量”的多周期电化学测试方法,并用此方法研究了热浸镀锌--55%铝--硅合金镀层不同组织的耐蚀性能.结果表明,锌--55%铝--硅镀层的腐蚀分为三个阶段,分别对应镀层结构中的富zn相、富al相和合金相,其腐蚀反应极化电阻的平均值分别为500ωcm2、1000cωm2和12000cωm2,表明合金相的耐蚀性能最好.

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