浅谈跨海大桥钢箱梁涂装配套设计

介绍了跨海大桥钢箱梁防腐蚀涂装配套体系的设计依据和桥梁重防腐涂料产品的选择,对不同类型的防锈底漆、中间漆以及面漆分别进行了对比论述,并提出了我国桥梁标准中存在的不足。     

我国跨海大桥钢结构防腐保护与涂装

介绍了我国跨海大桥钢结构的建设情况及其防腐蚀涂装。     

缆索防护用防腐涂料与涂装

介绍了跨江、跨海悬索桥的缆索用防腐涂料选择和涂装工艺.     

钢结构重防腐涂料涂装配套体系及案例分析

通过应用实例,介绍了钢结构重防腐涂料和涂装的配套体系。     

厦漳跨海大桥钢箱梁外侧涂装工艺设计

详细介绍了厦漳跨海大桥钢箱梁外侧防腐涂层的配套方案、涂装工艺、涂装设备及质量控制,涂装工艺设计方案符合业主涂层配套的质量要求,符合ISO14713国际标准的规定,使热喷铝、防腐涂层的使用寿命大于20a。     

北京航材百慕公司为青岛海湾跨海大桥供应混凝土防腐涂料

北京航材百慕新材料技术工程有限公司混凝土防腐涂料已被青岛海湾大桥防腐工程选用,涂装面积占总施工面积的50％。这是北京航材百慕新材料技术工程有限公司承担的混凝土防腐项目中继杭州湾跨海大桥后的又一个国家级重点项目。     

钢铁厂管道与设备用防腐涂料与涂装建议

通过对钢铁厂所处地理环境进行分析,并参照业主要求进行经济型涂装设计,对其管道与相关设备提出使用防腐涂料及涂装工程建议。     

客车车身防腐涂料的选用与涂装

提出了导致车身腐蚀的原因、对策、涂料的选用和涂装手段,并且阐述了自己的观点。     

钢结构管道防腐涂料配套推荐方案

钢结构管道防腐层的质量，取决于钢结构表面的处理，防腐涂料的选用及合理的施工等。专家卞大荣根据华东电力设计院及其他设计院的要求，针对伊朗电厂的腐蚀情况，较详细地介绍了防腐涂料的选用与配套、涂装前表面处理的质量要求、涂装环境条件、油漆的调配、涂料施工和检验等，该推荐方案可供诸参考。     

水工钢结构防腐涂料与涂装

通过对水工钢结构腐蚀环境的分析,提出不同工况条件下所采用的防腐涂料、配套及施涂工艺要点。     

钢结构防腐配套方案的设计

论述了钢结构腐蚀机理和腐蚀防护措施。介绍了大气环境的6种腐蚀分类方法。对处于不同腐蚀环境中的钢结构涂装规范进行了详细说明。以两个成功的案例说明了锌粉底漆 环氧中间漆 丙烯酸聚氨酯面漆涂装配套体系具有较佳的防护性能。     

桥梁钢结构防腐蚀涂层配套和涂层使用寿命

介绍了桥梁钢结构防腐涂层设计的相关依据:ISO12944-5:2007、BS EN ISO14713:1999和JT/T722-2008。从防腐方法的选择、钢结构设计、涂层配套方案及膜厚确定、涂装管理、涂装设计以及完善的涂层维护计划的建立等方面对影响桥梁钢结构防腐效果的因素进行了探讨。     

Investigation of the corrosion resistance characteristics of pigments in alkyd coatings on steel

Pigments are added to polymeric coatings for enhancing the protective characteristics of the barrier films that are deposited on metal surfaces to prevent corrosion. Electrochemical impedance spectroscopy (EIS) measurements were performed on carbon steel specimens coated with alkyd primers containing different pigments. Corrosion monitoring was carried out in immersion tests in 3.0 wt.% NaCl solution open to air at room temperature. Changes in the impedance characteristics of the systems were found to occur as a function of the exposure time in all the cases, though their evolution with time showed marked differences which derived directly from nature of the pigments contained in the alkyd primers. The impedance response of the coatings was found to correspond to a porous film presenting localized electrochemically reactive areas, though pigments may facilitate additional resistance to the protective film, the extent of which was found to depend on the nature of the pigment. In this way, the best results were found for the alkyd primer containing aluminium powder.     

现代桥梁钢结构防腐涂层体系设计

根据钢结构所处的腐蚀环境、涂装部位和预期使用寿命设计相应的涂层配套体系,是现代桥梁钢结构防腐涂层体系设计的基本原则.本文介绍了桥梁钢结构所处的腐蚀环境,JT/T722-2008标准对桥梁钢结构涂装部位和防腐年限的有关界定,不同腐蚀环境下桥梁钢结构防腐寿命和漆膜厚度的关系,以及长效型防腐涂层配套体系.论述了高性能防腐涂料...     

Molybdate‐doped copolymer coatings for corrosion prevention of stainless steel

The polypyrrole and polyaniline copolymer coating (PPy‐PAni) and PPy‐PAni doped with sodium molybdate copolymer coating ( ) were synthesized on stainless steel by cyclic voltammetry. The effect of molybdate on the passivation of stainless steel was investigated by linear sweep voltammetry in 0.2 mol L^?1 of oxalic acid. The corrosion prevention performances of these copolymer coatings for stainless steel were investigated by linear sweep voltammetry, electrochemical impedance spectroscopy in 1 mol L^?1 of sulfuric acid, and potentiodynamic polarization in 0.1 mol L^?1 of hydrochloric acid. Copolymer coating doped with molybdate could accelerate the formation of the passive oxide film and have better corrosion prevention efficiencies than PPy‐PAni coating on stainless steel. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40602.     

挪威Hardanger大桥钢箱梁外侧电弧喷锌工艺设计

在承接挪威Hardanger大桥钢结构制作中,根据业主的要求,以电弧喷锌作为配套涂层底漆。为了适应钢结构涂装流水线以及佐敦公司的重防腐配套涂料,从钢结构缺陷处理等级、磨料拼配方案、喷砂技术条件、电弧喷锌设备及锌丝线材要求、电弧喷锌工艺参数以及喷锌层质量要求等方面对钢箱梁外侧电弧喷锌工艺进行了设计。     

金属构件重防腐涂料的选择及涂装工艺

分别介绍了用于重防腐涂料底漆的型号为D ICEP(A)和D ICEP(B)的重防腐涂料的基本性质、技术参数和与之配套的4种丙烯酸改性聚氨酯面漆(包括Ⅰ型、Ⅱ型、Ⅲ型和Ⅴ型)的技术参数以及其中甲乙组分的质量比,并介绍了重防腐涂料涂装工艺流程。分别探讨了在底漆和面漆涂装过程中的注意事项,并介绍了喷涂设备技术参数和重防腐涂料配套应用实例。     

Polyaniline for corrosion prevention of mild steel coupled with copper

Polyaniline emeraldine base/epoxy resin (EB/ER) coating was investigated for corrosion protection of mild steel coupled with copper in 3.5% NaCl solution. EB/ER coating with 5-10 wt% EB had long-term corrosion resistance on both uncoupled steel and copper due to the passivation effect of EB on the metal surfaces. During the 150 immersion days, the impedance at 0.1 Hz for the coating increased in the first 1-40 days and subsequently remained constant above 10⁹ Ω cm², whereas that for pure ER coating fell below 10⁶ Ω cm² after only 30 or 40 days. Immersion tests on coated steel-copper galvanic couple showed that EB/ER coating offered 100 times more protection than ER coating against steel dissolution and coating delamination on copper, which was mainly attributed to the passive metal oxide films formed by EB blocking both the anodic and cathodic reactions. Salt spray tests showed that 100 μm EB/ER coating protected steel-copper couple for at least 2000 h.     

Protection of stainless steel by polyaniline films against corrosion in aqueous environments

Polyaniline (PANI) thin films were electrochemically deposited by cyclic voltammetry on stainless steel electrode previously covered by a thin film of polyvinyl acetate (PVAc). The corrosion resistance of PANI covered stainless steel substrates was estimated by using potentiodynamic polarization curves and its linear polarization resistance (LPR) was measured in 0.5 M H₂SO₄, 0.5 M NaCl and 0.5 M NaOH aqueous solutions at room temperature. The results indicate that the PANI-PVAc films did improve the corrosion resistance of the stainless steel in NaOH, behaving even worst, in the case of PANI film, than the uncoated substrate. In H₂SO₄ both PANI and PANI-PVAc coatings gave good protection for the stainless steel electrode, with a slightly better performance of PANI-PVAc than PANI. In NaCl solution both PANI and PANI-PVAc films provided a good protection against corrosion. The better performance of PANI-PVAc coatings for corrosion protection in basic media may be due to its major chemical stability compared to simple PANI films, which lose their conductivity in high pH solutions. The E _corr (free corrosion potential) value of the coated substrate was in the passive region of the uncoated substrate in acidic environment but in the active region in neutral or basic environment.     

Capped inhibitor-loaded halloysite nanoclay-based self-healing silica coatings for corrosion protection of mild steel

The effect of polymeric nanocapsule capping in benzotriazole encapsulated into halloysite nanoclay (HNTs) dispersed into hybrid silica coatings was investigated for corrosion protection of mild steel. Optimization of the amount of inhibitor-loaded halloysite nanotubes with and without capping in the coating sol was carried out. The prepared formulations were dip-coated on mild steel substrates using dip-coater and then cured at 130 °C for 1 h. Surface morphology and elemental analysis of the nanoclay were studied using scanning electron microscopy and energy dispersive X-ray spectroscopy. X-ray diffraction and Fourier Transform Infrared spectroscopy analyses were carried out to confirm the encapsulation and capping of the halloysite nanoclay. The anti-corrosion and autonomic-healing properties of bare and coated substrates in 3.5 wt% NaCl solution were studied using electrochemical impedance spectroscopy, potentiodynamic polarization measurements and scanning vibrating electrode technique for varying exposure times. The coatings generated from the capped inhibitor-loaded HNTs dispersed sol-gel matrix was seen to provide higher corrosion resistance when compared to uncapped HNT based silica coatings. Electrochemical studies carried out for capped inhibitor-loaded HNT based coatings have shown an increase in charge transfer resistance to 10⁸ Ω cm² from 10⁶ Ω cm² of uncapped inhibitor-loaded HNT based coatings.