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.

美国国家科学院、工程院和医学院（National Academies of Sciences，Engineering，and Medicine）将召集一个由来自工程、材料科学和制造业相关领域的志愿者专家组成的特设委员会，审议与地球应用中使用的钢的腐蚀相关的知识状况和技术问题（例如，地基加固、管道和基础设施地基）。委员会成员将从德国、私营和公共部门中选出，并编写一份同行评审的共识报告，总结裸露或涂层钢在土壤材料中腐蚀的主要机制（例如，不同地质环境中的松散土壤或岩石）;表征土壤材料影响腐蚀和腐蚀速率的特性的实践状态;以及与预测、识别和监测土壤材料中的钢的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和多学科研讨会寻求相关技术团体的广泛投入，这些研讨会涉及现有和正在开发的现场，实验室和建模方法，用于表征和监测埋地钢的腐蚀。在知识的差距和短期和长期的研究和实践需要提高长期性能的钢在地球上的应用将被描述。腐蚀模型的材料科学家主要集中在钢在空气和水中的腐蚀。较少的模型预测钢在地球材料中的腐蚀和腐蚀速率，并且这些模型不能充分反映具有局部化学、地质学、生物学、水文学和土地利用异质性的地球环境。 当埋地钢筋发生故障时，通常不知道原因是否是岩土工程场地特性差、钢筋设计和保护选择不当、施工不当、钢筋腐蚀机制建模不当、土地使用或气候条件变化导致的地下条件变化，或这些因素的复合。 这项研究将是一个跨学科的检查的不确定性，在整个“生命周期”的埋钢：从性能建模，钢铁制造，地下站点特性，以及设计，施工，运营和维护的基础设施采用埋钢。将建议进行必要的研究，以填补这些努力中的知识空白。 最终，社会将受益于更具弹性和成本效益的基础设施，这些基础设施的性能符合预期，需要更少的维修。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。