常规水稳剂对铜合金HSn70-1B的腐蚀性能研究

【作者】 周臣；

【导师】 王风云； 雷武；

【作者基本信息】 南京理工大学 ， 物理化学， 2004， 硕士

【摘要】 工业循环水系统中，为了防止系统中出现结垢腐蚀现象，常在循环冷却水中添加一定剂量的阻垢剂和缓蚀剂，然而阻垢剂在一定剂量范围内对铜合金也具有一定的腐蚀作用。缓蚀剂只有在一定的介质环境、投加量适当时，才能对铜合金起到缓蚀作用。水中常见的一些离子同样对铜合金有一定的腐蚀。本文通过实验测定了几种水质稳定剂如HPAA、HPMA、PBTC、HEDP、ATMP、PAA等对铜合金HSn70-1B的腐蚀情况；研究了1-羟基苯并三氮唑，苯并三氮唑，甲基苯并三氮唑，甲基苯并三氮唑钠盐，重铬酸钾在pH=3、5、7、10、12条件下，不同投加浓度时对铜合金HSn70-1B的缓蚀性能；考察了水中常见某些离子(SO₄^2-、Cl^-、Zn²⁺、CU²⁺、Fe³⁺及NH₃)在常规浓度下对铜合金HSn70-1B的腐蚀性能。实验结果表明：水质稳定剂中的阻垢剂对铜离子有较强的络合作用，使用浓度不当会造成腐蚀；常规使用浓度下，阻垢剂对铜合金HSn70-1B的腐蚀一般都是脱锌腐蚀；随着缓蚀剂浓度的增加，铜合金的腐蚀速率下降；有机缓蚀剂的缓蚀效果普遍好于无机缓蚀剂；有些离子随着浓度的增加腐蚀率也相应增加，有些离子随着浓度的增加腐蚀率反而减小甚至腐蚀率为零。更多还原

【Abstract】 Scale inhibitors are often added to the systems in order to prevent the scaling on and corrosion of the exchanger or the pipes in the industry recirculation water system. Copper-alloys are easily corroded in the medium of the inhibitors. Only in the special medium and using appropriate doges of scale inhibitors and corrosion inhibitor, the corrosion rate of copper-alloy can meet the standard of the state. Some ions in the water also can corrode the copper-alloy. The corrosion of copper-alloys caused by scale inhibitors (such as HPAA, HPMA, PBTC, HEDP and so on), corrosion inhibitors (i.e. BTA, TTA, K2Cr2O4 and so on) and ions (for example, SO42-, Cl-, Fe3+ and so on) in the water were determined. The results of the experiment showed that the scale inhibitors had a strong complexity for copper ions, the corrosion took place when the doges of scale inhibitors had been used, the corrosion of copper-alloys caused by the scale inhibitors was generally a type of corrosion of zinc removal at the general concentration, the corrosion rate of copper-alloy would descend with the enhancement of the concentration of corrosion inhibitors, the effect of organic corrosion inhibitors is generally better than inorganic corrosion inhibitors, and that the effect of the ions on the corrosion rate of the alloy depend on the type and the concentration of the ions.更多还原