木质素磺酸钠对镁合金AZ91D的缓蚀作用及其机理研究
A Study of Corrosion Inhibition Effect and Corrosion Inhibition Mechanism of Sodium Lignosulphonate on Mg Alloy AZ91D
摘 要
采用电化学方法和失重法等研究了木质素磺酸钠（SLS）对镁合金AZ91D在3.5% NaCl溶液中的腐蚀抑制作用；采用扫描电镜（SEM）和能谱仪（EDS）对比分析了其腐蚀产物膜的形貌、膜层厚度和成分。结果表明：SLS能明显抑制镁合金AZ91D在3.5% NaCl溶液中的腐蚀行为，缓蚀率随SLS含量的增加而升高；由于SLS的团聚作用，镁合金AZ91D在含不同量SLS的3.5% NaCl溶液中的缓蚀机理不同；SLS不参与成膜，SLS对镁合金的吸附是物理吸附。
AZ91D镁合金
木质素磺酸钠
corrosion inhibitor
AZ91D Mg alloy
sodium lignosulfonate
Abstract
The corrosion inhibition effect of sodium lignosulfonate (SLS) on magnesium alloy AZ91D in 3.5% NaCl solution was studied by electrochemical method and weight loss method. The morphology, film thickness and composition of corrosion product film were analyzed by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results show that SLS could significantly inhibit the corrosion behavior of magnesium alloy AZ91D in 3.5% NaCl solution, and the corrosion inhibition rate increased with the increase of SLS content. Due to the agglomeration of SLS, the corrosion inhibition mechanism of magnesium alloy AZ91D in 3.5% NaCl solution containing different amounts of SLS was different; SLS did not participate in film formation, and the adsorption of magnesium alloy by SLS was physical adsorption.
中图分类号 TG174 DOI 10.11973/fsyfh-201905010
所属栏目 试验研究
基金项目
收稿日期 2017/11/15
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引用该论文: LIU Yao,LU Zhaoxia,ZHENG Meng. A Study of Corrosion Inhibition Effect and Corrosion Inhibition Mechanism of Sodium Lignosulphonate on Mg Alloy AZ91D[J]. Corrosion & Protection, 2019, 40(5): 359
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参考文献
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【4】JOOST W J,KRAJEWSKI P E. Towards magnesium alloys for high-volume automotive applications[J]. Scripta Materialia,2017,128:107-112.
【5】刘元刚,张巍,李久青,等. 汽车发动机冷却液中镁合金缓蚀剂的研究[J]. 腐蚀科学与防护技术,2005,17(2):83-86.
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【7】GAO H,LI Q,CHEN F N,et al. Study of the corrosion inhibition effect of sodium silicate on AZ91D magnesium alloy[J]. Corrosion Science,2011,53(4):1401-1407.
【8】HU J Y,HUANG D B,SONG G L,et al. The synergistic inhibition effect of organic silicate and inorganic Zn salt on corrosion of Mg-10Gd-3Y magnesium alloy[J]. Corrosion Science,2011,53(12):4093-4101.
【9】HOU L F,DANG N,YANG H Y,et al. A combined inhibiting effect of sodium alginate and sodium phosphate on the corrosion of magnesium alloy AZ31 in NaCl solution[J]. Journal of the Electrochemical Society,2016,163(8):C486-C494.
【10】高继峰,刘德绪,龚金海,等. 磷酸一氢钠对AZ91镁合金的缓蚀作用[J]. 腐蚀与防护,2014,35(3):233-238.
【11】KARTSONAKIS I A,STANCIU S G,MATEI A A,et al. Evaluation of the protective ability of typical corrosion inhibitors for magnesium alloys towards the Mg ZK30 variant[J]. Corrosion Science,2015,100:194-208.
【12】GAO H,LI Q,CHEN F N,et al. Study of the corrosion inhibition effect of sodium silicate on AZ91D magnesium alloy[J]. Corrosion Science,2011,53(4):1401-1407.
【13】GAO H,LI Q,DAI Y,et al. High efficiency corrosion inhibitor 8-hydroxyquinoline and its synergistic effect with sodium dodecylbenzenesulphonate on AZ91D magnesium alloy[J]. Corrosion Science,2010,52(5):1603-1609.
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【17】FRIGNANI A,GRASSI V,ZANOTTO F,et al. Inhibition of AZ31 Mg alloy corrosion by anionic surfactants[J]. Corrosion Science,2012,63:29-39.
【18】肖涛,党宁,侯利锋,等. 木质素磺酸钠对3.5% NaCl溶液中AZ31镁合金的缓蚀作用[J]. 稀有金属材料与工程,2016,45(6):1600-1604.
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