共查询到20条相似文献,搜索用时 125 毫秒
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异噻唑啉酮作为杀菌灭藻剂广泛应用于工业循环冷却水系统中,配方中多用含铜盐作为稳定剂,Cu2 的存在可能造成系统管道金属的电化学腐蚀.通过静态挂片试验考察了Cu2 对碳钢、黄铜和不锈钢腐蚀的情况.研究表明,在试验浓度下,Cu2 对碳钢的腐蚀速率为32.75 mg/(m2·h),对黄铜的腐蚀速率为28.03 mg/(m2·h);而对不锈钢没有明显的腐蚀作用.另外,Cu2 浓度是腐蚀的关键因素,随着浓度的增加,Cu2 对金属的腐蚀速率加快,在达到峰值后,浓度增加,腐蚀速率不再增加.实际应用时,异噻唑啉酮中的铜盐在冷却水中被大大稀释,实际浓度比本试验浓度小很多,对循环冷却水系统中管道腐蚀的影响基本可以忽略. 相似文献
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苯并异噻唑啉酮接枝丙烯酸锌树脂的合成及抑菌性能 总被引:1,自引:0,他引:1
借鉴有机锡侧链防污结构,设计并合成具有类似有机锡树脂侧链丁基锡防污结构的苯并异噻唑啉酮接枝丙烯酸锌树脂,主要通过顺丁烯二酸酐对苯并异噻唑啉酮改性,赋予其羧酸基团,再与丙烯酸树脂接枝获得苯并异噻唑啉酮接枝丙烯酸锌树脂,赋予其侧链防污结构链段。通过核磁共振氢谱、傅立叶红外光谱表征手段鉴定其结构,并结合假交替单胞菌与创伤弧菌两种海洋细菌验证其抑菌性能。试验结果表明苯并异噻唑啉酮接枝丙烯酸锌树脂对海洋细菌具有优异的抑菌效果。 相似文献
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黑白照相材料或彩色反转材料加工用的黑白显影液,经常生长微生物。显影液中由于菌类聚集而产生的泥浆状积垢会影响显影组份的正常性能。根据这篇报告,向显影液里加入一种杀菌剂便可控制微生物在黑白显影液里的生长。特别有效的杀菌剂包括以下几类:氯代酚类,如对-氯-间二甲酚、三氯苯酚、五氯苯酚;噻唑类,如2-甲基-4-异噻唑淋-3-酮和5-氯-2-甲基-4-异噻唑啉-3-酮;季胺盐化合物类,如二 相似文献
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本工作研究了苯骈三唑、二苯甲酮和噻唑啉酮类紫外线吸收剂,讨论了它们的物理、化学和光谱吸收特性与分子结构的关系,并指出磺酸基对其溶解性和吸收光谱的影响规律是:引入一个磺酸基时,其水溶性是二苯甲酮>苯骈三唑>噻唑啉酮;磺酸基使吸收光谱明显地蓝移,蓝移的强度是噻唑啉酮>苯骈三唑>二苯甲酮。 相似文献
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《软包装商情》2020,(6)
建立了一种超高效液相色谱法测定(UHPLC)包装纸原纸和包装纸中2-甲基-4-异噻唑啉-3-酮(MI)、5-氯-2-甲基-4-异噻唑啉-3-酮(CMI)和1,2-苯并异噻啉-3-酮(BIT)含量的快速分析方法。样品经水溶液超声提取、离心、有机滤膜过滤后,进行液相分析,EclipsePlus C18 RRHD色谱柱分离,流动相选择甲酸水-甲醇溶液,采用梯度洗脱方式。此外,还对提取溶剂、提取时间、紫外检测波长进行了研究。在最优检测条件下,三种异噻唑啉酮在0.02~5.0 mg L~(-1)范围内均呈良好的线性关系(R~2均大于0.999),包装纸原纸中,低、中、高浓度加标回收率在80.7~99.4%之间,相对标准偏差不高于3%,MI、CMI、BIT的检出限分别为0.0204、0.0310、0.0397 mg kg~(-1),定量限分别为0.0680、0.103、0.132 mg kg~(-1)。包装纸中,低、中、高浓度加标回收率在80.9~112.4%之间,相对标准偏差不高于6%,MI、CMI、BIT的检出限分别为0.0286、0.0189、0.0264 mg kg~(-1),定量限分别为0.0954、0.0631、0.0880 mg kg~(-1)。该方法已应用于实际样品的检测,有望为包装纸的绿色、安全印刷提供保障。 相似文献
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清除照相加工水洗罐中生长的菌泥,是一项既花钱又费力的工作。水中的细菌一旦得到定影液中养份的滋养,就会迅速生长。本文提出两种解决办法,其一是使用干溴条(溴氯二甲基海因)杀菌并使滋养细菌的硫代硫酸盐氧化;其二是使用一种杀菌剂(5-氯-2甲基-4异噻唑啉-3-酮,2-甲基-4-异噻唑啉-3-酮),它将杀死细菌并保持活性以使水处于无菌状态。两种方法无论选择哪种对照相材料都是无害的。 相似文献
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本发明为一种反渗透膜用杀菌剂及其制备方法,其特征在于:反渗透膜用杀菌剂由异噻唑啉酮、含溴氮基丙酰胺、含溴的硝基化合物以及溶剂和水复配组成;在室温至50℃下,加入去离子水或反渗透产水,将溶剂加入反应釜中,加入含溴氮基丙酰胺搅拌溶解,再加入含溴硝基化合物搅拌溶解, 相似文献
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异噻唑啉酮微胶囊的制备表征及释放行为 总被引:1,自引:0,他引:1
以二异氰酸酯(TDI)、聚乙二醇4000(PEG)、二羟甲基丙酸(DMPA)和三乙胺(TEA)为原料,制备可水乳化的聚氨酯(WPU).以合成的WPU为囊壁、以异噻唑啉酮衍生物(Sea-nine 211)为囊芯,通过乳化自组装得到防污剂Sea-nine 211微胶囊,用红外光谱、粒径分布和扫描电镜对胶囊进行表征,并采用分... 相似文献
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通过对两种奥氏体不锈铜022Cr17Ni12MO2和06Cr18Ni11Ti进行不同工艺的固溶处理,研究了固溶温度、保温时间及冷却方式对两种不锈钢材料的抗拉强度Rm、规定非比例延伸强度Rp0.2和RP1.0,以及伸长率A的影响规律。结果表明:相比于空冷,采用水冷方式有利于提高两种不锈钢材料的强度,而冷却方式对两种不锈钢伸长率的影响不明显;随着固溶温度的升高和保温时间的延长。总体上两种不锈钢材料的强度降低,伸长率增加。 相似文献
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A corrosion spreading throughout the 304 stainless steel tubing of a water system to supply various buildings was observed, and also leaks were detected in welding zones. The same place is also crossed by a gas distribution network, with a helium pipe 316 of stainless steel that required periodic repairs more or less every two years, due to the presence of leaks. The tests showed that both types of stainless steel have suffered localized corrosion induced by hypochlorite ion, in a mechanism of dry/wet, and that the welding procedure performed on the 304 stainless steel is unacceptable. Some immediate procedures were undertaken to keep systems running, but recommendations were given for a final resolution of the problems. 相似文献
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16Cr奥氏体不锈钢晶间腐蚀的敏感性 总被引:1,自引:0,他引:1
为了研究1Cr17Mn6Ni5N奥氏体不锈钢(16Cr奥氏体不锈钢)的晶间腐蚀行为,通过光学显微镜(OM)、X射线衍射仪(XRD)和晶间腐蚀试验研究了其在不同敏化温度和冷却方式下,晶间碳化物的析出和耐晶间腐蚀性能的变化。结果表明:16Cr奥氏体不锈钢在敏化温度区间内加热时,晶界碳化物随加热温度的上升而增加,加热温度为850℃左右时晶界析出碳化物最多,主要为Cr_(23)C_6和Cr_7C_3;在敏化温度区间内相同加热温度时,水冷可显著减少其晶界碳化物的析出;16Cr奥氏体不锈钢对晶间腐蚀不敏感。 相似文献
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冷凝器换热管失效分析 总被引:2,自引:0,他引:2
采用宏观检查,化学分析和金相检验等方法对冷凝器换热管报废原因进行了分析,结果表明,由于不锈钢焊接管在含有氯离子的冷却水中形成钝化-活化微电池,致使不锈钢焊接管腐蚀而报废,采取改换材料为18-8型无缝奥氏体不锈钢管和改良冷却水等措施,取得良好效果。 相似文献
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《Engineering Failure Analysis》2003,10(3):329-339
A urea plant, operating on ammonia and carbon dioxide (CO2) gases, had to be shutdown due to corrosion in the intercooler and aftercooler of its CO2 gas cleaning circuit. Extensive general corrosion of AISI type 304 stainless steel parts, such as sealing strips, fins, demisters and the shell, of these two components which were in contact with the duplex stainless steel tubes, caused the shutdown of the fertiliser plant within 6 months. Investigations of the corrosion products by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) techniques showed the presence of carbon and ammonia based compounds, thus suggesting the role of ammonia and CO2 gases, or the product of their reactions, in the corrosion of type 304 stainless steel. Electrochemical polarisation studies showed that duplex stainless steel possessed a more positive open circuit potential and a nobler critical pitting potential than type 304 stainless steel thus confirming that the corrosion of type 304 stainless steel was caused by the galvanic action with the duplex stainless steel heat transfer tubes. Hence, it was recommended that (i) the same material (type 304 stainless steel) be used for all parts of the intercooler and aftercooler to avoid galvanic corrosion, (ii) condense water carried over by CO2 gas by cooling it to low temperatures immediately after it comes out from the scrubber, (iii) slight modification of the process to add up to 0.8% oxygen in the CO2 gas before entry into the intercooler, which will help in retaining/formation of an effective passive film on type 304 stainless steel. 相似文献
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A sulfuric acid plant was equipped with heat exchangers with Nicrofer 3620 tubing. The cooling medium was sea water. Within 5 weeks after start-up some of the tubes failed by pitting, showing that it is impossible to use stainless steel as a heat transfer material in sea water unless the molybdenum content is very high. 相似文献