影响富锌底漆防腐性能的因素分析

简要介绍了富锌底漆的防腐机理及标准中对富锌底漆干膜锌含量的指标要求,重点探讨了成膜物、锌粉、防锈颜料、漆膜厚度对富锌底漆防腐性能的影响。     

醇溶性无机硅酸锌车间底漆的制霍

以醇溶性无机硅酸锌涂料专用树脂为成膜物,添加锌粉、磷铁粉、防锈颜料、防沉剂、助剂及溶剂制成一种能与大部分涂料体系配套使用的无机硅酸锌车间底漆。探讨了各种组分的选择对底漆性能的影响。     

醇溶性无机硅酸锌车间底漆的制备

以醇溶性无机硅酸锌涂料专用树脂为成膜物,添加锌粉、磷铁粉、防锈颜料、防沉剂、助剂及溶剂制成一种能与大部分涂料体系配套使用的无机硅酸锌车间底漆。探讨了各种组分的选择对底漆性能的影响。     

新一代水性无机锌车间底漆的研制

以水性无机富锌涂料专用树脂为主要成膜物质,采用防锈颜料锌粉、磷铁粉、硅灰石粉研制出一种高性能的水性无机锌车间底漆(IZ651-II)。该车间底漆零VOC,采用纯水作为稀释剂,对操作工人的健康极为有利,具有广阔的应用前景及经济效益与社会效益。     

片层状颜料对醇溶性鳞片富锌底漆性能的影响

采用正硅酸乙酯为成膜物质,鳞片状锌粉为防锈颜料,制备了醇溶性鳞片富锌底漆。在配方中通过添加不同类型的片层状颜料,考察其对该型富锌底漆涂层性能的影响。     

快干型水性环氧富锌底漆的研制

以水性环氧树脂作为成膜物质,以锌粉为主要防锈颜料,制备出一种耐腐蚀性良好的快干型水性环氧富锌底漆.对影响环氧富锌底漆耐腐蚀性能和干燥性能的一些因素,如水性环氧树脂和填料的选择、锌粉用量以及助溶剂类型及其复配等进行了研究.结果表明,选用水性树脂C,滑石粉质量分数10%、锌粉质量分数50%,助溶剂b和c按2:1的质量比搭配时,所得水性环氧富锌底漆的性价比最佳,表干时间为5 min.     

高锌粉含量的单组分环氧富锌底漆的研制

以自制的改性环氧树脂为基料,锌粉为防锈颜料,制备出干膜中锌粉含量达96%以上的单组分环氧富锌底漆。同时考察了影响漆膜防腐蚀性能和涂料贮存稳定性的因素。实验表明:锌粉的含量在95%～97%时,漆膜的防腐蚀效果最好,经过1 000 h的耐盐雾试验后,漆膜保持完好;采用0.2%有机膨润土和1%聚酰胺蜡搭配使用,有效地解决了单组分环氧富锌底漆中锌粉沉降结块的问题,根据实验结果得到最佳单组分环氧富锌底漆配方,同国外同类型的产品相比具有更好的性价比。漆膜性能优异,VOC含量较低,环保性能好。     

高性能水性环氧富锌底漆的研制

以自制的改性环氧树脂和水性胺类固化剂为基料,加入锌粉防锈颜料和助剂,研制了一种水性环氧富锌底漆,并对涂层的耐盐雾性、耐盐水性和机械性能进行了测试。结果表明：锌粉的添加量在75％～80％时,漆膜的防腐蚀性能最好;1％有机膨润土与0．5％气相二氧化硅配用,可有效解决水性环氧富锌底漆中锌粉沉降、结块的问题。     

锌粉的有效锌含量的测定

锌粉在涂料中主要作防锈颜料。用超细锌粉制造的环氧富锌底漆具有优异的防蚀性能,而且能与多种面漆配套,是目前国内最佳的保养防锈涂料之一。富锌涂料在国外也广泛应用于船舶、桥梁,以及其它工程的钢铁结构。因此,超细锌粉的生产和质量引起了有关方面的重视。     

海上风力发电机塔筒用湿固化富锌底漆的研制

采用环氧改性湿固化聚氨酯树脂为基体树脂,鳞片状锌粉为防锈颜料,有机膨润土SD-2为防沉剂,研制了一种单组分湿固化富锌底漆。该涂料施工方便,且对底材表面处理要求低,与传统的富锌底漆相比,防腐性能更优,适用于高防腐要求的海上风力发电机塔筒。     

Effects of residual white rust of inorganic zinc silicate primer on corrosion protection of epoxy-coated carbon steel

Inorganic zinc silicate primer is widely used in shipbuilding as a preconstruction primer (or shop primer) on steel plates; however, white rust of zinc is formed on inorganic-zinc-silicate-coated steel surfaces exposed to outdoor conditions such as rain and humidity. In this study, effects of residual white rust of inorganic zinc silicate primer on corrosion protection of epoxy-coated carbon steel were examined by water ballast simulation and condensation chamber tests. Pull-off adhesion, blistering, and cathodic disbondment tests were also performed for the same purpose. Test results clearly indicated that the residual white rust did not affect the corrosion protection when the steel surface was treated with light to heavy sweep blasting.     

Influence of the composition of zinc-ethyl silicate paints on electrochemical properties

The protection of steel by zinc-ethyl silicate primers is based on the general principle of cathodic protection by metallic zinc in contact with a ferrous substrate. The influence of the zinc content on the paint behaviour has been studied, but little attention has been paid to effects caused by the incorporation of additives, such as extender pigments, to the formulation.The aim of this paper is to study the influence of the whole composition of zinc-ethyl silicate paints on their electrochemical properties. A second purpose is to establish the nature of the anticorrosive action of these paints. Four commercial zinc-ethyl silicate paints were chosen for these investigations.It was found that the incorporation of extender pigments modified the behaviour of these paints. The anticorrosive action was due to the cathodic protection by zinc powder and the inhibition of the electrochemical reactions by corrosion products. The barrier effect, in the sense of ohmic resistance, provided by these paints was of lesser importance.     

高性能醇溶性无机富锌涂料的研制

主要研究了无机硅酸锌底漆的制备工艺,并通过调整水解度,使用不同的树脂加以改性。使用各种试验测试手段对涂膜性能进行了分析检测,并讨论了不同制备工艺对涂膜性能的影响,最终得到涂膜的各项性能完全达到车间底漆和长效防腐底漆的要求。     

Comparative electrochemical studies of zinc chromate and zinc phosphate as corrosion inhibitors for zinc

The anticorrosive performance of two inhibitive pigments, zinc chromate and zinc phosphate, was compared using electrochemical impedance spectroscopy (EIS) and the scanning vibrating electrode technique (SVET) in pigment extracts in 0.1 M NaCl. It was observed that zinc was protected from corrosion in both extracts. In tests using hot dip galvanised steel painted with an epoxy primer incorporating the pigments, the SVET detected the anodic and cathodic distribution along the scribes, although no significant differences were observed among the various primers. On the contrary, EIS was able to distinguish processes occurring on the metal surface exposed by the scribe in different samples. For primers with anticorrosive pigment, a time constant at high frequencies was attributed to a layer of protective nature, probably formed by metal ions from the substrate and inhibitive ions leached from the anticorrosive pigments.     

无机硅酸锌车间底漆在冶金设备涂装中的应用

介绍了无机硅酸锌车间底漆在冶金设备涂装中的应用以及施工步骤,此漆具有突出的快干性,可焊性,漆膜薄,污染程度小,对工件在车间周转过程中起到临时防腐的作用,可带漆直接焊接,不会影响其焊接机械性能,焊缝中凹坑、气孔等较少,在热加工过程中,对漆膜损坏程度少,并且与面漆的配套性能极佳,无论是有机系或无机系树脂漆,均可配套使用。     

适合压载舱涂层配套的船用车间底漆的研制

介绍了车间底漆的制备、性能的测试.讨论了硅酸乙酯在不同当量的酸性和碱性条件下的水解情况,碱性条件下反应剧烈,不易控制,且制得的水解液贮存期短;不同型号的硅酸乙酯经水解后,硅羟基的含量不同,导致交联密度也不同,使车间底漆涂层与钢材间的附着力产生较大的差异;分析了不同锌含量对车间底漆性能及与压载舱主涂层配套性的影响.     

新一代水性无机富锌底漆的生产与施工应用

通过对高模数无机硅酸盐进行改性,使无机富锌底漆的质量与施工使用得到改善与提高,实现了水性富锌底漆与溶剂型富锌环氧底漆施工使用同样方便,性能更好,尤其是产品的环保性能和良好的防腐性能。     

埋地输油管道检测、维修与评估的探讨

为了保证某公司所属12条埋地管道的安全运行,基于国内外通用的管道完整性管理理念,对12条埋地管线进行了有针对性的检测、维护与改造。首先进行管道腐蚀环境调查、阴极保护效果测试,基本掌握管道防腐层破损严重、阴极保护效果较差的管段,同时,对腐蚀防护系统保护效果较差的管段,开展有针对性的全面检验检测。在此基础上,对存在严重安全隐患的管段,采取防腐层修复与阴极保护改造措施以确保管道运行安全。实践证明,对在用的输油管道,采取必要的全面检验与针对性维护措施是确保管道安全运行的有效手段。     

The impact of pigment volume concentration on the protective performance of polyurethane coating with second generation of phosphate based anticorrosion pigment

In this study the effect of conventional zinc phosphate and zinc aluminum phosphate, which represents second generation of phosphate based anticorrosion pigments, on the performance of a polyurethane coating was studied. While zinc phosphate modification was proved to be effective on the corrosion resistance, EIS data facilitated the determination of the optimum pigment volume concentration in which the coating offered the most efficient protection. The superiority of zinc aluminum polyphosphate was attributed to the release of more inhibiting species, leading to the formation of a protective layer at the coating/substrate interface. In addition to the assessment of the impact of pigment content on the resistance of polyurethane primer to cathodic disbonding, the dependency of adhesion strength on the pigment type was also studied using pull-off test.