Corrosion of Buried Steel at New and In-Service Infrastructure

新建和在役基础设施中埋地钢材的腐蚀

• 批准号: 1916526
• 负责人: Sammantha Magsino
• 金额: $ 20万
• 依托单位: National Academy of Sciences
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1916526&HistoricalAwards=false
• 关键词: Corrosion; Buried; Steel; New; Service

The National Academies of Sciences, Engineering, and Medicine (the National Academies) will convene an ad hoc committee of volunteer experts from relevant fields in engineering, materials sciences, and manufacturing to consider the state of knowledge regarding, and technical issues associated with the corrosion of steel used in earth applications (e.g., ground stabilization, pipelines, and infrastructure foundations). Committee members chosen from academe and the private and public sectors will prepare a peer reviewed consensus report summarizing the primary mechanisms of the corrosion of bare or coated steel placed in earth materials (e.g., unconsolidated earth or rock in different geologic settings); the state of practice for characterizing earth materials for properties that influence corrosion and corrosion rates; and the use, efficacy, and uncertainties associated with methods to predict, identify, and monitor corrosion of steel in earth materials. The committee will seek broad input from relevant technical communities through meetings and a multi-disciplinary workshop on existing and developing field, laboratory, and modeling methods for characterizing and monitoring corrosion of buried steel. Gaps in knowledge and the short- and long-term research and practices needed to improve long-term performance of steel in earth applications will be described.Corrosion models by materials scientists have focused largely on corrosion of steel in air and water. Fewer models predict corrosion and corrosion rates for steel in earth materials, and those models do not adequately reflect earth environments with heterogeneities in local chemistry, geology, biology, hydrology, and land use. When failures of buried steel occur, it often is not known whether the cause was poor geotechnical site characterization, poor choice of steel design and protection, improper construction, inappropriate modeling of steel corrosion mechanisms, changes in subsurface conditions resulting from changed land use or climatic conditions, or a compounding of these factors. This study will be an interdisciplinary examination of uncertainties throughout the "lifecycle" of buried steel: from performance modeling, to steel manufacturing, to subsurface site characterization, and to the design, construction, and operation and maintenance of infrastructure employing buried steel. Research needed to fill the knowledge gaps in these endeavors will be recommended. Ultimately society will benefit from more resilient and cost-effective infrastructure that performs as expected and required fewer repairs.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

美国国家科学，工程和医学学院（美国国家科学院）将召集来自工程，材料科学和制造业相关领域的志愿专家的临时委员会，以考虑有关与地球应用中钢铁腐蚀相关的知识状态的知识状态，例如地球，地面，稳定性，稳定，管道，管道，管道，管道，式，型号和INFRASTRASTIONS）。从学术界选出的委员会成员和私营部门将准备一份同行审查的共识报告，总结了放置在地球材料中的裸露或涂层钢的主要机制（例如，在不同的地质环境中，未固定的地球或岩石）；表征地球材料的实践状态，以影响腐蚀和腐蚀速率；以及与预测，识别和监测地球材料中钢腐蚀的方法相关的使用，功效和不确定性。该委员会将通过会议向相关技术社区寻求广泛的意见，以及有关现有和发展中的领域，实验室和建模方法的多学科研讨会，以表征和监测埋藏钢的腐蚀。将描述在地球应用中改善钢的长期性能所需的知识差距以及短期和长期研究和实践。更少的模型预测地球材料中钢的腐蚀和腐蚀速率，这些模型并不能充分反映局部化学，地质，生物学，水文学和土地使用中异质性的地球环境。 当埋葬钢的失败发生时，通常不知道原因是岩土工程地点表征不良，钢设计和保护的选择不佳，建筑不当，对钢腐蚀机制的不适当建模，土地使用变化或气候条件变化而导致的地下条件的变化或这些因素的化合物。 这项研究将是对整个埋葬钢的“生命周期”中不确定性的跨学科检查：从性能建模到钢制制造，再到地下场地表征，再到采用埋葬钢的设计，建设，运营和维护。建议填补这些努力中的知识空白所需的研究。 最终，社会将受益于更具弹性和具有成本效益的基础设施，该基础设施按预期进行，需要更少的维修。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的评估评估标准来通过评估来支持的。