| 压铸镁合金AZ91D在酸性NaCl溶液中的腐蚀行为 |
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| 引用本文： | 马全友,王振家,王璐科,李培杰.压铸镁合金AZ91D在酸性NaCl溶液中的腐蚀行为[J].表面技术,2004,33(4):16-18. |
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| 作者姓名： | 马全友 王振家 王璐科 李培杰 |
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| 作者单位： | 清华大学机械工程系,北京,100084 |
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| 摘 要： | 采用电化学方法研究了压铸镁合金AZ91D在酸性NaCl溶液中的腐蚀行为,并用扫描电镜观察了腐蚀形貌,对腐蚀产物进行了能谱分析.研究结果表明:在酸性溶液环境下,随着Cl-浓度的升高,镁合金的平衡腐蚀电位降低,线性阻抗减小,腐蚀电流增大;随着pH值的减小,晶界出现腐蚀开裂现象;富Al相的耐蚀性高于基体相,在酸性环境中,腐蚀产物主要为MgO和Mg(OH)2
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| 关 键 词： | AZ91D 酸性 NaCl 腐蚀 压铸镁合金 酸性环境 NaCl 溶液环境 腐蚀行为 Solution Acidic Magnesium Alloy Behavior 基体相 耐蚀性 开裂现象 晶界 腐蚀电流 阻抗 线性 电位降 平衡 浓度 结果 |
| 文章编号： | 1001-3660(2004)04-0016-03 |
Corrosion Behavior of AZ91D Magnesium Alloy in Acidic Solution of NaCl |
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| MA Quan-you,WANG Zhen-jia,WANG Lu-ke,LI Pei-jie.Corrosion Behavior of AZ91D Magnesium Alloy in Acidic Solution of NaCl[J].Surface Technology,2004,33(4):16-18. |
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| Authors: | MA Quan-you WANG Zhen-jia WANG Lu-ke LI Pei-jie |
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| Abstract: | The corrosion behavior of AZ91D magnesium alloy in acidic solution of NaCl was investigated by means of electrochemistry,and the corrosion surface was observed using SEM and EDX. The result shows that the equilibrium potential and linear impedance of AZ91D magnesium alloy gradually decreases while corrosion current rises with the increase of Cl~- concentration in acidic solution; corrosion cracking occurs on grain boundaries with pH decreasing; corrosion resistance of aluminum-saturated phase is better than that of the base phase; the corrosion products are mainly MgO and Mg(OH)_2 in acidic solution of NaCl. |
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| Keywords: | AZ91D Acidity NaCl Corrosion |
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