中央空调环保复合型阻垢缓蚀剂的筛选及性能研究

doi:10.11902/1005.4537.2015.186

中国腐蚀与防护学报

2016, Vol. 36

Issue (5): 407-414 DOI: 10.11902/1005.4537.2015.186

本期目录 | 过刊浏览

中央空调环保复合型阻垢缓蚀剂的筛选及性能研究

代陈林¹,李茂东²,杨波²,乔越¹,朱志平¹(

)

1. 长沙理工大学化学与生物工程学院长沙 410114
2. 广州特种承压设备检测研究院广州 510050

Performance of Environmentally Friendly Corrosion- and Scaling-Inhibitor for Central Air Conditioner Cooling Water

Chenlin DAI¹,Maodong LI²,Bo YANG²,Yue QIAO¹(

),Zhiping ZHU¹

1. School of Chemical and Biological Engineering, Changsha University of Science & Technology, Changsha 410114, China
2. Guangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou 510050, China

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摘要:

通过筛选和优化得到最佳配方的复合型水处理剂,该复合配方的组成为水解聚马来酸16 mg/L+表面活性剂1.5 mg/L+月桂酰基肌氨酸钠75 mg/L+唑类2.0 mg/L。采用静态阻垢法、旋转挂片法和极化曲线法对复合型水处理剂的阻垢缓蚀性能进行了研究,采用扫描电镜对腐蚀试片和垢样的形貌进行了观察。结果表明,复合药剂的阻垢率高达95.70%,对A3碳钢和T2紫铜的缓蚀率分别达到95.58%和93.25%,是一种性能优良的阻垢缓蚀剂。复合药剂通过吸附在CaCO₃晶面的活性生长点,使晶格发生扭曲,以达到阻垢效果,复合药剂对A3碳钢是一种抑制阳极极化为主的混合型缓蚀剂;对T2紫铜是一种抑制阳极极化的阳极型缓蚀剂。

关键词 ：中央空调循环冷却水, 复合型水处理剂, 水解聚马来酸酐, 月桂酰基肌氨酸钠

Abstract：

In order to solve the problems of scaling and corrosion of copper and iron in cooling water system for central air conditioner, an optimal compound water treatment agent was developed by screening assay. The compound agent consists of HPMA 16 mg/L+ Surfactant 1.5 mg/L+SLS 75 mg/L+Azole 2.0 mg/L. The performance of corrosion- and scaling- inhibition of the compound agent was characterized by immersion test, rotary coupon test, polarization curve measurement and SEM. Results show that, the compound water treatment agent is a kind of high performance agent as scaling- and corrosion-inhibitor with scaling-inhibition rate as high as 95.70%, while its corrosion-inhibition efficiencies for A3 carbon steel and T2 red copper were 95.58% and 93.25%, respectively. The scaling inhibition effect of the compound agent may be ascribed to the selective adsorption on the active growing points on the CaCO₃ crystal facets, which then resulted in distortion of the crystal lattice. The compound agent is a kind of mixing type inhibitor for A3 carbon steel, while a kind of anodic inhibitor for red copper, which mainly suppressed the anodic polarization.

Key words： central air conditioner cooling water compound water treatment agent HPMA sodium N-Lauroyl sarcosinate

基金资助:国家质检总局科技项目 (2014QK168) 资助

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引用本文:

代陈林,李茂东,杨波,乔越,朱志平. 中央空调环保复合型阻垢缓蚀剂的筛选及性能研究[J]. 中国腐蚀与防护学报, 2016, 36(5): 407-414.
Chenlin DAI, Maodong LI, Bo YANG, Yue QIAO, Zhiping ZHU. Performance of Environmentally Friendly Corrosion- and Scaling-Inhibitor for Central Air Conditioner Cooling Water. Journal of Chinese Society for Corrosion and protection, 2016, 36(5): 407-414.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2015.186 或 https://www.jcscp.org/CN/Y2016/V36/I5/407

图1 单一药剂的阻垢效果图

图2 STA与HPMA复配后的阻垢效果

图3 ATC与SLS复配后的缓蚀效果

表1 添加单一药剂时的腐蚀实验结果

表2 四因素两水平正交试验参数设置

表3 正交试验结果

表4 阻垢正交试验结果分析表

表5 A3碳钢缓蚀正交试验结果分析表

表6 T2紫铜缓蚀正交试验结果分析表

图4 HPMA的用量对复合配方阻垢性能的影响

图5 SLS用量对复合配方缓蚀效果的影响

图6 未添加和添加复合药剂的垢样的SEM像

图7 腐蚀试片的金相显微像

表7 复合配方的缓蚀实验结果

图8 A3碳钢和T2紫铜的极化曲线

表8 极化曲线参数

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