磷酸锌/云铁灰环氧涂层防腐性能的研究

选用磷酸锌为主要防锈颜料,协同云母氧化铁灰,制备无溶剂型环氧防腐涂料.考察涂层的基本性能,并采用交流阻抗(EIS)测试技术,分析了颜料体积浓度(PVC)、活性稀释剂和防锈颜料质量比对涂层防腐性能的影响.实验结果表明:该涂料固含量高达98%以上,是环境友好型涂料;PVC小于12%时,涂层具有较好的防腐性能;PVC为8%,活性稀释剂添加量为2%,云铁灰与磷酸锌质量比为1:4时涂层的防腐性能最佳.在涂层浸泡一定时间后,磷酸锌能防止腐蚀的进一步发生,起到有效抑制腐蚀的作用.     

固化剂对钢结构用超薄膨胀型水性环氧防火涂料性能的影响

以环氧乳液为基料,聚磷酸铵、三聚氰胺、季戊四醇(APP/MEL/PER)为防火助剂研制了超薄膨胀型钢结构防火涂料。通过调整环氧乳液/固化剂比例,研究了固化剂用量对涂料防火、防腐性能的影响。通过交联度测试进一步讨论了环氧乳液与固化剂比例对涂料性能的影响。结果表明:固化剂占环氧乳液含量20%时,涂层的防火性能和防腐性能均较好。     

纳米氢氧化铝在膨胀型钢结构防火涂料中的应用研究

选用新型纳米氢氧化铝阻燃材料,应用于超薄膨胀型钢结构防火涂料中对其防火性能和防腐性能的影响进行了研究,通过采用小室燃烧试验法、产烟试验、耐腐蚀性试验、电子显微镜等的实验检测和分析结果为依据,指出使用纳米氢氧化铝阻燃材料是进一步提高防火涂料性能和防腐蚀性能的途径之一。提出了纳米氢氧化铝阻燃材料的最佳加入量在6%时,防火涂料既有很好的防火性能和理化性能,又有优良的防腐蚀性能。以期能对今后研制高性能的超薄型钢结构防火涂料提供有价值的参考。     

新型水性环氧防腐涂料的制备与性能研究

本文采用单组份水性环氧树脂为成膜物质,三聚磷酸铝、磷酸锌为复合防锈颜料,改性蛭石为防腐功能填料,研究了颜填料配方体系对涂料防腐性能的影响。结果表明：采用磷酸锌：三聚磷酸铝=3：2,改性蛭石添加量8%时所制备得到的防腐涂料性能最好。     

磷酸锌中重金属对双组分聚氨酯防腐涂料性能的影响

以不同重金属含量的磷酸锌为原料制备双组分聚氨酯防腐涂料,运用傅里叶变换红外光谱仪（FTIR）研究了重金属对双组分聚氨酯防腐涂料固化速率的影响,利用盐雾性能研究了重金属含量对双组分聚氨酯涂料防腐性能的影响。结果表明,磷酸锌中的重金属含量越高,其制备的聚氨酯涂料固化速度越快,耐盐雾性能越差,耐冲击性能越差。     

防腐颜料对水性环氧涂料性能的影响

在水性环氧涂料中,添加防腐颜料对涂层防腐性能有一定的影响,而不同种类的化学防腐颜料对涂层的作用有所差异。通过对磷酸钼锌、磷酸锌铝、磷酸锌、磷酸铝及钙离子交换硅胶颜料的电导率、形貌分析以及由他们制成的涂层进行研究,以及漆膜耐中性盐雾试验、电化学交流阻抗谱及剥离涂层后的能谱(EDAX)进行分析,结果表明:在水性环氧涂料体系中,磷酸铝锌颜料颜料的防腐性能最优。     

钢结构防火、防腐双功能涂料的研究

研制了具有优异的防火隔热性能和防腐性能的双功能钢结构防火涂料用防腐树脂.采用在环氧树脂分子结构中引入含甲氧基官能团的聚合法,用有机硅树脂改性环氧树脂,再用改性环氧树脂对丙烯酸树脂进行改性,以提高树脂的耐候性、耐腐蚀性和耐水性.并介绍了对其树脂的改性、制备工艺、应用性能及防腐性能等方面的研究工作.     

聚苯胺在环氧涂层中的防腐性能

主要通过聚苯胺环氧涂层的耐盐雾试验,考察了聚苯胺在环氧涂层中的防腐性能。试验结果表明聚苯胺具有较好的防腐性能,且600目的聚苯胺粉比200目有更好的防腐效果。聚苯胺与其他颜填料有较好的配伍性,添加到环氧磷酸锌涂料中,可提高其防腐性能。     

改性磷酸锌在水性环氧防腐涂料中的应用

通过选用钼酸锌对磷酸锌防锈颜料进行改性,并将其应用于水性环氧防腐涂料中,制得了具有优异防腐功能的新型水性环氧涂料。研究了改性磷酸锌对水性环氧涂料的耐盐雾腐蚀性能的影响,确定了水性环氧防腐涂料的最佳PVC值,并使用SEM对防锈颜料及水性环氧涂料的性能进行了表征。结果表明当使用钼酸锌对磷酸锌防锈颜料进行改性,水性环氧防腐涂料的PVC值为38%时,此时水性环氧防腐涂料的耐盐雾性能可达500 h,且涂料具有最佳的综合性能。     

改性磷酸锌的防腐性能研究

研究了两种改性磷酸锌(磷酸铁锌、磷钼酸锌)的防腐性能,并与普通磷酸锌、铬酸锌的防腐性能进行对比.首先,采用电化学方法分析了防锈颜料提取液的防锈性能,结果表明磷钼酸锌的防锈性能优于普通磷酸锌,而磷酸铁锌的防腐性能反而不如普通磷酸锌,而磷酸系颜料的防锈性能均不如铬酸锌.其次,通过盐水浸泡和盐雾实验对几种防锈颜料在环氧涂层中的防腐性能进行了研究.盐水浸泡过程中的电化学阻抗谱表明磷酸铁锌能显著提高涂层的屏蔽作用,而通过涂层划痕后进行ASTM B-117实验发现磷酸铁锌能显著提高涂层与金属界面的附着力和涂层的屏蔽作用,而磷钼酸锌能提高涂层的耐锈蚀能力.从实验结果可以看出两种改性磷酸锌防锈颜料均可在实际应用中代替铬酸盐用于防腐涂料中.     

锌粉对环氧树脂防腐涂层改性的研究

通过添加纳米锌粉研究环氧富锌防腐涂层的工艺性能,分析了腐蚀电化学行为、涂层附着力及耐腐蚀性能.结果表明纳米锌粉的加入对涂层防腐性能有显著影响,随着纳米锌粉含量的增加,环氧富锌涂层的电化学性能明显提升,电阻值增加2～3个数量级,当纳米锌粉的加入量为20％时,涂层的防腐性能最佳.     

饰面膨胀型防火涂料的研制

报道了一种水性双组分膨胀型饰面防火涂料的研制。涂料的组分Ⅰ由基料 (A)、填料和添加剂组成 ;组分Ⅱ为磷酸。基料是特制的双氰胺 -尿素 -甲醛共聚物的胶体溶液。填料是二氧化钛 (B) ,添加剂是三氧化二锑 (C)、季戊四醇 (D)、氯化石腊 (E)。当组分Ⅰ组成为m (A)∶m(B)∶m (C)∶m (D)∶m (E) =1 0 0∶0 30∶0 0 4∶0 0 6∶0 0 4,m (组分Ⅰ )∶m (组分Ⅱ ) =1 0 0∶0 2 5时 ,性能达到饰面防火涂料一级标准。用正交优化工艺制备的防火涂料 ,涂覆比 1 0kg/m2 时 ,耐火时间超过 2h ,可作超薄型钢结构防火涂料使用。该防火涂料的特点是 :不但防火性能好、不污染环境、适用范围广 ,而且装饰效果好 ,达到普通涂料的装饰水平     

Preparation of PANI/epoxy/Zn nanocomposite using Zn nanoparticles and epoxy resin as additives and investigation of its corrosion protection behavior on iron

Conducting polyaniline, zinc and epoxy resin solely have anticorrosive properties by different mechanisms on metallic substrates. In this work the triple hybrid of PANI/epoxy/Zn nanocomposite was prepared as a thin layer coating (70 ± 5 μm) on iron coupons and its anticorrosion performance was investigated in HCl (0.1 M) as corrosive solution. Epoxy resin and zinc nanoparticles were applied as additives in the PANI matrix to improve the mechanical properties of PANI coating and investigate their synergetic effects on the anticorrosion performance of PANI coating. At first PANI/Zn nanocomposite coatings with different Zn contents were prepared and the zinc content optimized so that the coating achieve the best anticorrosion performance. Accordingly the iron coupons coated by PANI/Zn coating having 4 wt% Zn content showed more noble open circuit potential and lower corrosion current values. Then epoxy resin was applied as additive to the optimized formulation of PANI/Zn coating in different weight percents (0–20 wt%) and the anticorrosion performance of the related PANI/epoxy/Zn triple hybrid nanocomposite coatings was evaluated. Results showed that the addition of epoxy resin causes to the decreasing of corrosion current of iron samples coated by PANI/epoxy/Zn nanocomposite. An optimum range of 3–7 wt% was obtained for the epoxy content in the composition of PANI/epoxy/Zn nanocomposite in which the coating exhibits the best anticorrosion performance. Iron metal coupon was elementally analyzed and the PANI/Zn and PANI/epoxy/Zn nanocomposites were characterized using Fourier Transform Infrared spectroscopy, X-ray diffraction patterns and Scanning Electron Microscopy techniques.     

High-performance self-healing anticorrosion epoxy coating based on microencapsulated epoxy-amine chemistry

Attributed to the merits of excellent material compatibility, healing performance, and long-term stability, the self-healing system based on microencapsulated epoxy-amine chemistry is a potentially practical self-healing system for both structural and functional materials. Herein, based on the microencapsulated epoxy-amine chemistry, a self-healing anticorrosion coating was successfully developed. This self-healing coating system was modeled theoretically to explore the factors that influence the crack filling and the self-healing anticorrosion function. The established quantitative relationship shows that the filling depth of the crack in the coating is proportional to the microcapsule parameters and coating thickness, but inversely proportional to the crack width. Based on the above theoretical model, the effects of various parameters on the anticorrosion performance were experimentally studied. The actual filling of small in-situ cracks (<100 μm) generated by impact damage was semi-quantitatively characterized using scanning electron microscopy (SEM). The filling behavior is consistent with the theoretical modeling. After being healed at room temperature for 2 days upon impact damage, the formulated self-healing coatings were subjected to accelerated corrosion tests in 10 wt% sodium chloride (NaCl) solution for 2 days to observe their anticorrosion behavior. Compared to the neat epoxy coating, all the formulated self-healing epoxy coatings show evident anticorrosion function. Good self-healing anticorrosion performance was achieved by adding 10.0 wt% microcapsules with a size of 100–150 μm to the coating with a thickness of 300 μm. The results of this investigation laid a theoretical and technical foundation for the further development of both the self-healing chemistry and the self-healing anticorrosion coating.     

钢结构用防火粉末涂料的配方设计与改进

采用环氧树脂、聚酯树脂、环氧固化剂、阻燃剂(三聚氰胺、季戊四醇等)等研制出一种钢结构用防火粉末涂料。通过测试涂料的耐火时间、涂层干密度、膨胀倍率等性能以及耐火时间的对比,对该防火粉末涂料配方进行了3次改进,最终得到的防火涂料耐火时间达到了54min,防火能力接近国际先进产品的水平。该涂料不含有机溶剂,不需涂装防腐底漆,具有良好的应用和发展前景。     

阴极电泳无镍磷化工艺的开发及配套性能研究

介绍了一种阳离子为锌和锰的磷化液,可以满足阴极电泳配套性要求的无镍磷化工艺。通过对磷化膜膜重,溶出率、结晶形貌、膜成分、电泳后漆膜附着力、抗,中击、耐腐蚀等性能进行比较分析,结果表明在锌离子1．2g／L、锰离子O．8g／L、磷酸根16．0g／L的磷化工艺条件下形成的磷化膜性能指标符合阴极电泳配套要求,与常规锌锰镍系磷化膜基本无差别,性能指标远远高于高锌磷化工艺磷化膜。磷化膜的主要性能指标：P比为85．53％,膜重为3．2g／m2,晶型呈粒状,晶粒大小为3～4μm,磷化膜电泳溶出率为3．7％,附着力和冲击试验均合格,磷化膜与电泳漆复合膜（厚度为20．3μm）盐雾试验500h,单边扩展小于1mm,表面无气泡。     

风力发电机塔筒防腐涂料的研制与施工

根据风力发电机塔筒的使用环境、防腐涂层设计要求及施工要求研制了用于风力发电机塔筒的防腐蚀涂料,涂层系统由环氧富锌底漆、厚浆环氧中间漆、脂肪族聚氨酯面漆组成,文章讨论了基料、助剂等对涂层性能及外观的影响,以及施工中遇到的问题和解决方法。     

水溶性丙烯酸涂料加锌的改性

论述了水溶性丙烯酸钢铁底漆涂料制备、性能以及用锌粉对其进行改性的研究。本实验是在用环氧树脂改性后的水溶性丙烯酸树脂为主要成膜物质中加入锌粉，来改善其抗盐雾性，耐候性等性能，特别是改善其抗腐蚀性能和表面光洁性能等。结果表明，一定温度下在改性的水溶性丙烯酸钢铁底漆涂料中加入0．5％的锌粉后，经测定其耐盐雾性可达106h以上，抗腐蚀性能和表面光洁性能都得到了显著提高。     

电缆防火涂料在高速公路隧道中的应用研究对比

在运营中的高速公路隧道,由于防火需要,现在基本都在使用膨胀型电缆防火涂料。本课题通过试验应用对比,确认电缆防火改性涂料(纳米技术)与普通水性电缆防火涂料在高速公路隧道这一特殊环境下的使用效果。为高速公路隧道电缆防火和消防设计提供参考依据。     

The improvement of anticorrosion properties of zinc-rich organic coating by incorporating surface-modified zinc particle

The corrosion behaviors of zinc-rich coating with various zinc contents, ranging from 0 to 60 volume percent, in thin organic coatings (below 5 μm) were characterized by electrochemical impedance spectroscopy (EIS), free corrosion potential (E_corr) measurement and cycle corrosion test (CCT). It was verified that both coatings with 60 volume percent of zinc powder and without zinc powder showed good corrosion resistance mainly due to the cathodic protection and barrier effect, respectively. On the other hand, coatings with an intermediate concentration (10–40 vol.%) of zinc powder was not successful in protecting a steel substrate efficiently. To improve anticorrosion property of zinc-rich coating, the surface modification of zinc particle was carried out with derivatives of phosphoric and phosphonic acid in the aqueous solution. The effects of the surface modification of zinc particle on corrosion resistance of the coating were investigated with scanning vibrating electrode technique (SVET) and X-ray photoelectron spectroscopy (XPS). The best anti-corrosion performance was achieved when the incorporated zinc particle was treated with phosphoric acid 2-ethylhexyl ester and calcium ion simultaneously, which induced the formation of alkyl-phosphate-calcium complex layer of 190 nm in thickness on zinc particles. Corrosion resistance was improved by the decreased zinc activity and the increased compatibility between the formed complex layer on zinc surface and polymer binder matrix.