共查询到19条相似文献,搜索用时 140 毫秒
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通过旋转挂片实验研究了浓度、水温、pH、流动条件等因素对CCL2预膜效果和缓蚀性能的影响.结果显示,GCL2对碳钢的缓蚀作用随预膜浓度和运行浓度的升高而增强,预膜浓度200mg/L,运行浓度7.5ng/L时缓蚀率高达90.6%.GCL2在水温为25℃、40℃和60℃时都具有很好的成膜性能和缓蚀作用,需要在冷却水流动的条件下才能形成完整的保护膜.GCL2在弱酸性条件下具有很好的缓蚀性能,当冷却水pH值为6时,25mg/L GCL2的缓蚀率为89.3%. 相似文献
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本文叙述了在不停车条件下对循环水系统进行清洗的配方选择及清洗实施方案。实践证明:采用H_2SO_4、TZ-401做清洗剂,TS-604做分散阻垢剂,TS-606做粘泥剥离剂,硫脲做为缓蚀剂能达到良好的剥泥、除垢及缓蚀效果。 相似文献
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S. Sankarapapavinasam F. Pushpanaden M. F. Ahmed 《Journal of Applied Electrochemistry》1991,21(7):625-631
The effect of tosyl-hydrazine (THy), 4-nitrobenzoyl-hydrazine (4-NBHy) and terephthalyl-hydrazine (terephthalyl-Hy) on the corrosion of copper and aluminium in sulphuric acid has been investigated. The inhibitive efficiency ranking of these compounds from both weight loss and polarization measurements was found to be terephthalyl-Hy > Thy > 4-NBHy for Cu and THy > 4-NBHy for Al. Both THy and 4-NBHy were found to be much less efficient as inhibitors for the corrosion of aluminium when compared to the corrosion of copper in sulphuric acid. The inhibitors acted cathodically both in the case of copper and aluminium, by merely blocking the cathodic reaction sites in the former and by altering the course of the mechanism of corrosion in the latter. The relative inhibitive efficiency of these compounds has been explained on the basis of structure dependent electron donor properties of the inhibitors and the nature of the metal-inhibitor interaction at the surface. 相似文献
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TS-838杀菌剂的性能和应用 总被引:7,自引:0,他引:7
为了解决循环冷却水中的微生物问题,克服目前常规使用的季铵盐杀菌剂的不足,研究开发了一种新型非氧化性杀菌剂TS-838,其主要成分为双季铵盐。TS-838对水中异养菌(TGB)和硫酸盐还原菌(SRB)有较好的杀灭效果,其杀菌能力优于传统的单季铵盐杀菌剂,TS-838对菌藻和生物黏泥具有极佳的剥离清洗作用。由于分子中具有两个长碳链,TS-838兼具缓蚀性能。 相似文献
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以某线路板厂络合铜废水为研究对象,采用硫酸亚铁法进行破络除铜,考察硫酸亚铁投加量、废水pH值和反应时间对Cu~(2+)去除效果的影响。结果表明,调节废水p H值为3.0,硫酸亚铁投加量为20.1 g/L,搅拌反应15 min,Cu~(2+)去除效果最佳。采取先中和后加硫酸亚铁,Cu~(2+)的去除率达到99.7%,出水Cu~(2+)质量浓度为0.25 mg/L,满足GB 21900—2008《电镀污染物排放标准》的要求。利用废碱水或者显影液为碱液,不但能代替氢氧化钠和减少硫酸亚铁的用量,还能达到废物利用,以废治废的目的。 相似文献
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F. L. Fragata C. C. Amorim A. P. Ordine M. C. Marroig R. O. Mota I. C. P. Margarit-Mattos 《Journal of Coatings Technology and Research》2009,6(2):229-235
Surface cleaning tools made of copper alloys are widely employed when sparks have to be avoided. On the other hand, copper
residues may be left on the surface. It is not known whether such copper incrustation interferes with the performance of a
painting system. Therefore, the aim of this paper is to evaluate the effect of steel surface treatment with copper-containing
tools on the performance of a painting system. Painted samples pretreated with ferrous and copper-containing tools were submitted
to corrosion tests. The performance was monitored by visual inspection and electrochemical impedance. The surfaces of unpainted
samples were analyzed by energy dispersion spectroscopy (EDS) and the open circuit potentials were measured. It is shown that
the residues left on the metallic surface due to the mechanical action of the cleaning tools did not interfere significantly
with the performance of the painting system. 相似文献
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