The variation of cathode curves wasn't obvious, but passivation occurs in the anode. With the variation of ammonium sulfite pH changing from acidity to alkality, passivation occurs in the anode and the corrosion speed is reduced.
当浓度高于7％，温度高于20℃时，焊接接头焊缝区阴极极化曲线变化不明显，阳极极化区出现极化率突然增大现象；随着亚硫酸铵介质pH由酸性向碱性转变，极化体系中焊接接头的各阳极区均出现钝化，其腐蚀速率减小。
参考来源 - 碳钢焊接接头在亚硫酸铵介质中的耐蚀性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The technique of treatment of water of high hardness and high alkality and the properties of water treatment agent ZH331HS and its application are introduced.
简要介绍了高硬度、高碱度的水处理技术和水处理剂ZH331HS的性能以及在循环水中的应用。
Results show that the modified cement with good durability, small expansion and low alkality can be made by use of gypsum and zeolite modifying alumina cement.
结果表明：以石膏和沸石对高铝水泥改性，可配制出耐久性良好、具有微膨胀性的低碱度改性水泥。
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