Corrosion monitoring systems for structures in extreme marine environments

极端海洋环境中结构的腐蚀监测系统

• 批准号: EP/D030196/1
• 负责人: Su Taylor
• 金额: $ 31.19万
• 依托单位: Queen's University Belfast
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FD030196%2F1
• 关键词: Corrosion; monitoring; systems; structures; extreme

Structures in the marine context are exposed to an extremely aggressive environment. Serious risks arise to marine structures through a combination of chemical, biological, and physical actions, which may result in significant costs of ownership and use. These are not just at the level of millions of pounds annually for repair, rehabilitation, and replacement, but also for 'cleaning-up' the contamination that would inevitably arise from failure. Seawater contains a wide variety of dissolved inorganic material, of which the chloride ion in particular significantly influences the corrosion of marine structures. In the atmospheric exposure zone, air-borne chlorides are major factors responsible for the corrosion of the concrete structures. In the splash zone, chlorides, waves and tides make a major impact on the degree of corrosion experienced through both chemical and direct velocity effects from ocean currents. Wave loading on structures can be highly destructive, particularly during storms, combining as it does with loading from extreme wave action and high winds. In the tidal zone, chlorides and the growth of bio-organisms together play an important role in promoting the progression of corrosion effects as, for example, organisms can grow on the surface of concrete, and this may lead to microbial disintegration of concrete itself. In the submerged area in addition to chlorides, the physical characteristics of the seafloor sediments can affect the deterioration of concrete; for example, the grain size and packing factors of the sediments affect diffusion through the sediments which has a major impact on the availability of oxygen and other corrosive agents. Given these complex effects of the ocean discussed above, and the important effect on the resultant corrosion of marine structures, advanced research, suitably prioritised, for more effective corrosion monitoring and better control is required to safeguard the integrity of the structures and their components which are exposed to such an extreme environment. Therefore, an accurate assessment of the corrosion conditions at different stages is of vital importance both for the proper selection of longer life materials, durable and anti-corrosion coatings, and for effective corrosion control, and forms an important backdrop for the study in this novel research project. To tackle this vitally important area, this application has been developed collaboratively by two academic groups, which are active in complementary aspects of the field, working together to create new solutions to recognised problems in this extreme environment. The applicants consider that this can be done most effectively through enhanced monitoring systems being created to make better and longer term use of current infrastructure and resources and thus to extend the life of structures.

海洋环境中的结构暴露在极具侵蚀性的环境中。由于化学、生物和物理作用的结合，海洋结构物面临严重风险，这可能导致拥有和使用的巨大成本。这些不仅是每年数百万英镑的维修，修复和更换费用，而且还用于“清理”因故障而不可避免地产生的污染。海水中含有多种溶解的无机物质，其中氯离子对海洋结构物的腐蚀影响尤其显著。在大气暴露区，空气中的氯化物是导致混凝土结构腐蚀的主要因素。在飞溅区，氯化物、波浪和潮汐通过洋流的化学和直接速度效应对腐蚀程度产生重大影响。结构物上的波浪荷载可能具有高度破坏性，特别是在风暴期间，因为它与极端波浪作用和强风的荷载相结合。在潮汐区，氯化物和生物有机体的生长在促进腐蚀效应的进展方面起着重要作用，例如，生物体可以在混凝土表面生长，这可能导致混凝土本身的微生物分解。在淹没区，除了氯化物外，海底沉积物的物理特性也会影响混凝土的劣化;例如，沉积物的粒度和堆积因素会影响通过沉积物的扩散，这对氧气和其他腐蚀剂的可用性有重大影响。鉴于上述海洋的复杂影响，以及对海洋结构物腐蚀的重要影响，需要进行先进的研究，适当优先考虑，以更有效地进行腐蚀监测和更好的控制，以保护暴露于这种极端环境的结构物及其组件的完整性。因此，准确评估不同阶段的腐蚀状况对于正确选择寿命更长的材料、耐久性和防腐蚀涂层以及有效的腐蚀控制至关重要，并为这项新研究项目的研究提供了重要背景。为了解决这一至关重要的领域，该应用程序由两个学术团体合作开发，这两个学术团体在该领域的互补方面非常活跃，共同努力为这种极端环境中公认的问题创造新的解决方案。申请人认为，最有效的办法是加强监测系统，以便更好和更长期地利用现有的基础设施和资源，从而延长建筑物的寿命。