共查询到19条相似文献,搜索用时 140 毫秒
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海洋生物污损是制约船舶业发展的重要问题。人们很早就开始对防污方法进行研究并先后采用机械除污法、涂覆防污涂料法、表面改性法等去除海洋附着生物。综述了船舶防污方法及其研究进展,通过分析各种防污方法的特点,指出了存在的问题,并对未来船舶防污的发展前景进行了展望。 相似文献
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防污涂料与船舶的航行经济效果密切相关。国内外船舶涂料界正从各种技术角度研究着新防污涂料。下边就防污涂料的现状与未来作一介绍。 1.海洋生物的污损及其防止方法生物污损可分为藤壶等的动物性污损和藻类等的植物性污损。整个附着污损过程是很复杂的。而防污方法的着眼点,就是选择一个切断其生长的环节。今后,一方面要不断完善过去使用的毒物溶出的方法,另一方面,要研究“不使生物附着的方法”。防污方法的基本原理如下: 相似文献
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170箱多用途集装箱船“太平泉”轮,船体利用牺牲阳极和长效涂料联合保护,压载水舱采用水舱漆和牺牲阳极共同保护,海水冷却系统安装防污防腐装置。这些综合性的防腐蚀防污损措施,大大增加了船舶的在航率,实船应用取得了明显的经济效益和社会效益。 相似文献
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海洋生物附着导致的生物污损是舰船航行过程中面临的一大难题,涂装防污涂料被认为是防止海洋生物污损舰船最经济有效的方法。根据舰船的服役特点,介绍了舰船防污涂料对于长效性、动静普适性和海域广谱性的使用需求,提出研发环保型长效防污涂料是当前防污损研究领域的一大挑战。简单综述了自抛光型防污涂料、污损释放型防污涂料、仿生型防污涂料、表面自愈型防污涂料以及其他防污新技术的发展,指出自抛光型防污涂料仍是当前稳定批量应用的主流产品,其他新型防污技术的防污期效仍需经过实际应用验证。随着环保要求的日趋严格,防污损机理研究的不断深入以及防污性能评价方法的不断完善,新型环保防污涂料的研制将逐渐加快并得到广泛推广应用。 相似文献
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为提高环氧涂料在受力和形变等动态环境下的性能,通过对环氧树脂和固化剂等基础材料的筛选、涂膜柔韧性能的改善和防腐蚀底漆配方的设计,研制一款无溶剂环氧树脂工业防腐蚀涂料。选取黏度较低的J51型环氧树脂以及与其成膜性好且漆膜力学性能优异的WH-31型环氧固化剂作为主要成膜物质,通过环氧活性稀释剂(SM80)进行增韧,当SM80与环氧树脂比例为1:7时,涂层柔韧性可达1mm且与碳钢板拉拔附着力可达12MPa。在此基础上进行无溶剂环氧铁红底漆研制,得到施工方便、力学性能优异、耐水性良好、耐碱性良好,耐盐雾可达1000h的工业防腐蚀底漆。 相似文献
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In this investigation, we have prepared an environmental-friendly waterborne coil coating primer. Waterborne saturated polyester resin and waterborne epoxy ester resin were selected as the binder resins, and methylated melamine resin and waterborne blocked isocyanate were selected as crosslinking resins. ZnMoO4, Zn3(PO4)2, Zn3Al(PO4)3, and AlH2P3O10 were selected as the anti-corrosion pigments, and modified nano-TiO2 particles and other fillers were also employed to further enhance the primer performance. It was found that when polyester/epoxy ester equals to 7/3; binder resins/curing agent equals to 5/1; pigments/binder resin is in range of 1.4–1.6; additives of each is in amount of 0.5 wt.%–1.5 wt.%, the obtained primer has ideal properties, such as T-bend performance and qualified adhesion, and the salt spray resistance test can reach 360 h with the primer film thickness in range of 6 μm–7 μm after baking at 224 °C for 45 s. As to the coil coating primer film formation mechanism, Fourier transform infrared spectrum analysis indicates that both the amino resin and blocked isocyanate may react with the binder resin, and such chemical reactions can make them crosslinked to form a stereo-network film, giving birth to a good overall performance of the obtained primer. 相似文献
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介绍了国内外长期效防腐技术现状:一是较为成熟的以喷涂金属涂层作为底漆的复合涂层体系,二是以富锌底漆为配套的重防腐涂层体系。列举了3种典型桥梁钢结构大气区防腐涂层配套试验室测试差异。根据厦门第二东通道所处的环境特点,结合国内外桥梁钢结构防腐技术,为项目提出可行的钢箱梁外表面防腐蚀技术方案为"环氧富锌底漆-环氧中间漆-氟碳面漆"防腐涂层。 相似文献
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Marine biofouling is a major issue deteriorating the service performance and lifespan of marine infrastruc-tures.The development of a durable,long-term,and environment-friendly antifouling coating is therefore of significant importance but still a critical challenge in maritime engineering.Herein,we developed a Cu-Ti composite antifouling coating with micron-sized alternating laminated-structure of Cu/Ti by plasma spraying of mechanically mixed Cu/Ti powders.The coating was designed to enable controlled release of Cu ions through galvanic dissolution of Cu laminates from the Cu/Ti micro-galvanic cell in aqueous solution.Results showed that remarkable antifouling efficiency against bacterial survival and adhesion up to ~100 % was achieved for the Cu-Ti coating.Cu/Ti micro-galvanic cell was in-situ formed within Cu-Ti coating and responsible for its Cu ions release.The successive dissolution of Cu laminates resulted in the formation of micro-channels under Ti laminates near surface,which contributed to controlled slow Cu ions release and self-polishing effect.Thus,environment-friendly antifouling capability and ~200 %longer antifouling lifetime than that of the conventional organic antifouling coatings can be achieved for the Cu-Ti coating.On the other hand,as compared to the conventional organic antifouling coatings,the Cu-Ti composite coating presented much higher mechanical durability due to its strong adhesion strength,excellent mechanical properties,and two orders lower wear rate.The present laminated Cu-Ti coating exhibits combination of outstanding antifouling performance and high mechanical durability,which makes this coating very potentially candidates in marine antifouling application. 相似文献
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按标准规定,防腐涂层浸泡一定时间后,若未出现起泡、开裂、脱落等失效现象,评价结果为合格。但部分评价合格的涂层,其附着力已大幅下降,防腐性能大大降低。该文选取浸泡后评价合格的8种防腐涂层,对其干态附着力和酸性环境浸泡后的湿态附着力进行了对比测试。测试结果表明,浸泡后部分涂层的附着力已大幅降低或丧失,金属基体有明显腐蚀特征;部分涂层附着力有所降低;2种常温固化的防腐涂层附着力略有升高。可见,通过对比涂层干/湿附着力,或者跟踪涂层服役过程中附着力的变化,可量化掌握涂层性能的保持状况和发展趋势。 相似文献
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粉末涂料应用前景广阔,为提高其重防腐蚀性能,研制了一种满足重防腐蚀保护要求的快速固化环氧粉末涂料,讨论了基料树脂的选择、固化剂型号及用量对涂膜性能的影响;确定了颜填料、流平剂和固化促进剂等助剂的选用对象,获得了该涂料的优选配方,并对优选配方涂料的性能进行了测试。结果显示:涂料绿色环保无污染,涂层具有优良的抗化学品性、耐溶剂、优异的力学性能及良好的附着力,施工工艺简单,不需要底漆可一次厚涂,快速固化有利于流水线作业,具有较广的应用前景。 相似文献