硝酸条件下不锈钢+碳钢材料缓蚀剂的开发研究

摘要采用了正交试验法研究了苯胺、硫氰酸钾、乌洛托品三种缓蚀剂在HNO3溶液中对于碳钢+不锈钢的缓蚀性能。三种缓蚀剂的药剂投加量分别选择了0mg/L、50mg/L、100mg/L、150mg/L。结果表明，在对碳钢的缓蚀能力方面，影响因素的顺序为苯胺>硫氰酸钾>乌洛托品；在对不锈钢的缓蚀能力方面，影响因素的顺序为乌洛托品>硫氰酸钾>苯胺。单因素缓蚀实验表明，在苯胺投加量为100mg/L，硫氰酸钾的投加量为150mg/L，乌洛托品投加量为50mg/L时对碳钢的缓蚀效果最好。探讨了酸洗过程中不锈钢的灰化现象的避免方法。结果表明，在加入150mg/L十二烷基硫酸钠条件下，能够有效的避免不锈钢灰化现象的发生。最后进行了验证试验。分别在40℃、2%HNO3，25℃、7% HNO3及2% HNO3中进行了验证实验，其腐蚀率符合《工业设备化学清洗质量标准》的要求。21110
关键词不锈钢碳钢腐蚀硝酸缓蚀剂
毕业论文设计说明书（论文）外文摘要
Title Research and development of the corrosion inhibitors for stainless steel and carbon steel in nitric acid solution
Abstract
Three kinds of corrosion inhibitors (aniline, potassium thiocyanate and urotropin) were used to investigate the corrosion inhibition properties on carbon and stainless steel in HNO3 solution. The dosages of three kinds of inhibitors were chosen 0mg / L, 50mg / L, 100mg / L and 150mg / L. The results indicated that the aniline showed the supreme effect on the corrosion of carbon steel, followed by the potassium thiocyanate and urotropin. For the inhibition to stainless steel, the strongest effect factor is urotropin, followed by potassium thiocyanate, and then by aniline. The results of the mono-chemical experiments indicated that the optimum dosage of 100 mg/L, 150 mg/L, and 50 mg/L for aniline, potassium thiocyanate and urotropin, respectively. The   coloring phenomenon of stainless steel in pickling process also were studied. We have selected sodium dodecyl sulfate solution to overcome the problem and the optimum dosage were found to 150 mg / L. Finally, the validation tests were carried out. When the washing condition were at for 25 ℃ for 2% HNO3 and 7% HNO3，40 ℃ for    2% HNO3, the corrosion level meet the requirements of the State Standard.
Keywords Stainless steel Carbon Steel Corrosion Nitric acid Inhibitor
目次
1    引言    1
1.1 缓蚀剂研究应用历史    1
1.2 硝酸酸洗缓蚀剂    3
1.3 缓蚀剂的机理    4
1.4 缓蚀剂主要类型    4
1.5 常用的缓蚀剂    7
1.6 本课题的研究内容及目标    7
2 实验部分    8
2.1 缓蚀性能的研究    8
2.2 最佳配比研究    13
2.3 单因素实验    14
2.4 对于不锈钢在缓蚀剂溶液中发灰的研究    16
2.5 在解决不锈钢灰化问题的情况下最佳配比的研究    16
2.6 验证试验    17
3 实验结果和分析    20
3.1 缓蚀性能的研究    20
3.2 最佳配比研究    24
3.3 单因素的研究    27
3.4 对于不锈钢在缓蚀剂溶液中发灰的研究    31
3.5 在解决不锈钢灰化问题的情况下最佳配比的研究    33 硝酸条件下不锈钢+碳钢材料缓蚀剂的开发研究:http://www.751com.cn/huaxue/lunwen_13182.html