高参数大容量锅炉盐酸酸洗新型缓蚀剂的探讨与研究

通过大量筛选试验,最终研制出适用于高参数大容量锅炉盐酸酸洗的新型缓蚀剂,并评价了该缓蚀剂的缓蚀性能,探讨了其缓蚀机理．     

不锈钢盐酸酸洗缓蚀剂

通过失重法测试了不同浓度的苯并咪唑类化合物（ＢＭＡＴ）在５％ＨＣｌ中对３１６Ｌ．不锈钢的缓蚀率，探讨其吸附规律符合Ｆｒｕｍｋｉｎ吸附等温式．通过温度对腐蚀率的影响计算表观活化能与吸附热，推断缓蚀机理为化学吸附．极化曲线测试表明．缓蚀剂属阴极为主的阴阳极混合型．     

盐酸酸洗咪唑啉型缓蚀剂IM的研究

以玉米油为原料合成了一种新型的咪唑啉型缓蚀剂IM ,利用静态失重法测定了该缓蚀剂在盐酸介质中对 2 0A碳钢的腐蚀速度和缓蚀效率 ,探讨了其缓蚀机理。结果表明 ,该缓蚀剂在盐酸介质中对 2 0A碳钢具有较强的缓蚀能力     

高参数大容量锅炉盐酸酸洗新型缓蚀剂的探讨与研究

通过大量筛选试验,最终研制出适用于高参数大容量锅炉盐酸酸洗的新型缓蚀剂,并评价了该缓蚀剂的缓蚀性能,探讨了其缓蚀机理。     

盐水介质碳钢缓蚀剂的研究

以葡萄糖酸盐、醇胺磷酸酯、表面活性剂、添加剂等合成了盐水介质碳钢缓蚀剂并用腐蚀失重法进行了评价。在 22.5％盐水介质中,硫酸锌:葡萄糖酸钙:钼酸盐:硫脲:醇胺磷酸酯:十二烷基苯磺酸钠=3.0:1.0:0.5:0.2:0.2:0.05,50℃时,碳钢缓蚀 率可达98％以上。     

新型柠檬酸酸洗缓蚀剂的缓蚀性能研究

通过腐蚀失重法研究了缓蚀剂对20#碳钢在柠檬酸溶液中腐蚀的缓蚀性能,并通过电化学极化分析对缓蚀剂的缓蚀机理进行了研究。结果表明,该缓蚀剂在2%⁸%柠檬酸中具有优良的缓蚀效果。在酸洗温度(95±2)℃,p H值为3.58%柠檬酸中具有优良的缓蚀效果。在酸洗温度(95±2)℃,p H值为3.5⁴.0,酸洗时间6 h,缓蚀剂添加量0.3%的条件下,缓蚀率达95%以上,且对三价铁离子具有很好的抑制效果。     

新型柠檬酸酸洗缓蚀剂的缓蚀性能研究

通过腐蚀失重法研究了缓蚀剂对20#碳钢在柠檬酸溶液中腐蚀的缓蚀性能,并通过电化学极化分析对缓蚀剂的缓蚀机理进行了研究。结果表明,该缓蚀剂在2%~8%柠檬酸中具有优良的缓蚀效果。在酸洗温度(95±2)℃,p H值为3.5~4.0,酸洗时间6 h,缓蚀剂添加量0.3%的条件下,缓蚀率达95%以上,且对三价铁离子具有很好的抑制效果。     

缓蚀剂文摘

抗氧化缓蚀剂ＣＴ 2 13在 (中国 )川东气田钻井液中的应用研究了抗氧化缓蚀剂ＣＴ 2 13对钻井液的作用。加入缓蚀剂ＣＴ 2 13后 ,Ｇ 10 5钢的腐蚀率从 1ｍｍ /ａ减少至低于 0 3ｍｍ /ａ ,该缓蚀剂可用于高分子钻井液等之中。ＣＡ 135 :12 4 5 73盐酸酸洗缓蚀剂及其缓蚀速率方程由不饱和醇和有机胺制备了碳钢盐酸酸洗缓蚀剂 ,由回归正交设计导出了二次缓蚀速率方程。在6 0℃、4ｍｏｌ/Ｌ盐酸中 ,不饱和醇的最佳浓度为0 5 2 4 ｇ/Ｌ ,有机胺的最佳浓度为 0 331ｇ/Ｌ ,画出了缓蚀速率曲线图。ＣＡ 135 :3472 93ＩＭＣ 1咪唑啉类钢用缓蚀…     

高温硫酸体系中碳钢缓蚀剂的研究

在任何温度下,60%以下的硫酸对碳钢的腐蚀速率都随着酸质量分数增大而提高。随着条件,如温度、流速等因素的提高,这种腐蚀还会加剧。针对高温硫酸酸洗环境,研究开发出一种缓蚀剂。通过试验发现,该缓蚀剂在(65±5)℃时,60%以下的硫酸酸洗环境中表现出较好的缓蚀效果,最佳质量分数推荐为1.5%～2.5%。     

固体酸洗缓蚀剂SGR-0404的研制

研制一种固体酸洗缓蚀剂SGR-0404,评价其缓蚀效率。结果表明,SGR-0404对碳钢在质量分数10%酸性介质中有良好的缓蚀效果。实际应用效果很好。     

Dissolution of carbon steel scrap in hydrochloric acid

The dissolution of carbon steel in hydrochloric acid has been investigated from the point of view of large scale manufacture of ferrous chloride. It has been found that the rate of dissolution at 95°c. can be represented by the equation R = k ([HCl] + 0.58 [FeCl₂)^0.45 where k varies with the physical and chemical nature of the steel. The activation energy varies with the particular experimental conditions over the range 12.0 to 18.1 K.cal/ mole. The rate of reaction is not influenced by agitation. The mechanism of the dissolution process is discussed together with practical aspects and pilot plant results.     

Luffa aegyptiaca leaves extract as corrosion inhibitor for mild steel in hydrochloric acid medium

The performance of methanol extract of Luffa aegyptiaca leaves (MLA) as corrosion inhibitor for mild steel (MS) in 1 M HCl was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy. Polarization measurements showed that the MLA acts as a mixed inhibitor. It was found that the percentage inhibition efficiency increased with MLA concentration and decreased with temperature. Thermodynamic parameters indicate the spontaneous adsorption of MLA on MS surface. In addition, it has been established that the adsorption process obeyed Langmuir isotherm. Additions of halide ions considerably increase the inhibition efficiency. Synergistic parameters confirm the synergistic effect of halide ions. The adsorption of the chemical constituents of MLA on MS surface was confirmed by Fourier transform infrared spectroscopy and atomic force microscopy.     

12-Aminododecanoic acid as a corrosion inhibitor for carbon steel

The inhibiting effect of 12-aminododecanoic acid (AA) on corrosion of carbon steel (CS) was investigated in hydrochloric acid of different pH, temperatures and over a prolonged period of time, and also in some other selected corrosive solutions. It was found that AA inhibits both partial corrosion reactions, with a slightly stronger inhibition of the anodic corrosion reaction. The corrosion protection mechanism is by formation of a surface-adsorbed AA monolayer that offers a hydrophobic barrier to transport of solvated corrosive ions to the surface. A maximum inhibition efficiency of 98.8 ± 0.5% was achieved in 0.5 M HCl. The adsorption of AA onto the CS surface was described by the Langmuir adsorption isotherm. The corresponding standard Gibbs energy of adsorption was calculated to be −26 kJ mol⁻¹. Polarization modulation infrared reflection absorption spectroscopy measurements revealed that the adsorbed AA monolayer is amorphous, which is due to the high heterogeneity of the CS surface.     

盐酸酸洗在冷却器上的应用

针对炼油厂冷却器的腐蚀情况,进行了分析．提出采用化学清洗的依据．通过应用,收到很好的效果．     

盐酸介质中头孢硫脒对碳钢的缓蚀作用

采用动电位极化曲线和交流阻抗实验,研究了抗生素——头孢硫脒的缓蚀剂在盐酸介质中对碳钢的缓蚀性能和缓蚀作用机理。结果表明,头孢硫脒对碳钢在1.0 mol/L盐酸溶液中具有良好的缓蚀性能,当头孢硫脒浓度为0.4 mmol/L时,缓蚀率达86%以上,为抑制阴极反应为主的混合型缓蚀剂。头孢硫脒在碳钢表面的吸附符合Langmuir等温式,属于单分子层吸附,其吸附行为是以化学吸附为主的物理和化学混合吸附。     

采用电位导数首零法研究热轧带钢盐酸酸洗的影响因素

酸洗是冷轧薄板生产中的一道重要的工序,本文采用电位导数首零法来判断热轧带钢在盐酸中酸洗的终点时间,研究了盐酸质量分数,温度及破鳞对酸洗结束时间的影响.为缩短酸洗时间,提高酸液温度的效果比增大酸液浓度的效果更好.     

盐酸介质中碳钢缓蚀剂最新研究进展

碳钢是工业应用最广用途最大的一种钢材,在对它的表面处理中,盐酸的使用最多。本文从酸洗清洁生产的角度出发,对近几年研究的在盐酸介质中所使用的碳钢缓蚀剂进行了分类总结,并提出了现阶段研究中还需要重点考虑的问题,最后对缓蚀剂的研发做出了展望。