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首页> 外文期刊>Corrosion Engineering, Science and Technology >Aluminium components for marine applications protected against corrosion by organic coating cycles with low environmental impact
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Aluminium components for marine applications protected against corrosion by organic coating cycles with low environmental impact

机译：船用铝部件可通过有机涂层循环保护免受腐蚀，对环境的影响小

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摘要

Marine propulsion systems, like sterndrive systems, must be protected from corrosion degradation. In particular, in the case of aluminium alloy parts, a protective cycle consisting in a surface pretreatment and an organic coating system are often applied. Traditionally, chromate based pretreatments are often applied on aluminium alloys in aggressive environments for the protective ability of chromate layers, together with the self-healing and adhesion promotion ability. The toxicity of chromium hexavalent is pressed to find new environmentally friendly solutions. In this paper, new results concerning different protective cycles for marine propulsion systems are presented. New surface pretreatments, including zircofluotitanates, chromium(III) treatments and silane layers, were characterised in conjunction with two different organic layers: waterborne paints and powder coatings. All the systems are free from organic solvents and toxic active pigments. By electrochemical measurements and salt spray exposure, it was possible to optimise the protective cycle with low environmental impact for the protection of aluminium components for marine propulsion systems, proving final performance comparable with the traditional systems containing chemicals with high environmental impact.
机译：船尾推进系统之类的船舶推进系统必须受到保护，以防腐蚀降解。特别地，在铝合金零件的情况下，通常进行包括表面预处理和有机涂层系统的保护循环。传统上，基于铬酸盐的预处理通常在侵蚀性环境中应用于铝合金，以保护铬酸盐层，并具有自我修复和促进粘合的能力。六价铬的毒性被迫寻找新的环保解决方案。在本文中，提出了有关船舶推进系统不同保护周期的新结果。结合两种不同的有机层（包括水性涂料和粉末涂料）对新型表面预处理进行了表征，包括锆氟钛酸盐，铬（III）处理和硅烷层。所有系统均不含有机溶剂和有毒活性颜料。通过电化学测量和盐雾暴露，有可能优化对环境影响小的保护周期，以保护船用推进系统的铝部件，从而证明其最终性能可与包含对环境影响大的化学药品的传统系统相媲美。

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