Magneting Tagging of Wood Preservatives

木材防腐剂的磁力标记

• 批准号: 9361884
• 负责人: Ronald Anthony
• 金额: $ 6.5万
• 依托单位: Engineering Data Management. Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-01-15 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9361884&HistoricalAwards=false
• 关键词: Magneting; Tagging; Wood; Preservatives

9361884 Anthony In-service performance of treated wood products depends on consistently inducting specified quantities (retention) of preservative chemicals to require depths (retention) of preservative chemicals to required depths (penetration) within the wood. Quality control procedures to ensure adequate penetration and retention currently rely on the removal of increment cores from a subset of all treated members for subsequent laboratory analysis. The proposed research will examine the feasibility of magnetically tagging wood preservatives to enable simple nondestructive evaluation of penetration and retention of preservative chemicals in treated wood. In magnetic tagging, a small amount of extremely fine "sensor" particles is uniformly distributed throughout the preservative prior to treatment. When subsequently interrogated by eddy current nondestructive evaluation, the tagged wood responds with a characteristics signature than can be related to preservative distribution. a feature of eddy current testing involving magnetically tagged materials is that electromagnetic energy can penetrate significant thicknesses of conducting tagged materials. This permits the volumetric characterization of tagged materials. The technical objectives of the Phase I research are (1) to evaluate the feasibility of introducing ferromagnetic particles into preservative chemicals and achieving penetration of the magnetically tagged preservative into wood, and (2) to evaluate the feasibility of measuring penetration and retention of magnetically tagged preservative with eddy current. ***

9361884安东尼处理过的木材产品的使用性能取决于持续引入特定数量(保留量)的防腐剂化学品，以要求防腐剂化学品在木材中达到所需的深度(渗透率)。确保充分渗透和保持的质量控制程序目前依赖于从所有经过处理的部件的子集中取出增量芯，以供随后的实验室分析。这项拟议的研究将考察磁性标记木材防腐剂的可行性，以便能够简单、无损地评估防腐剂在处理后的木材中的渗透和保留情况。在磁性标签中，在处理前，少量极细的“感应器”颗粒均匀地分布在防腐剂各处。当随后被涡流无损评估询问时，标记的木材响应的特征签名可能与防腐剂的分布有关。涉及磁性标记材料的涡流检测的一个特点是，电磁能量可以穿透导电标记材料的显着厚度。这允许标记材料的体积表征。第一阶段研究的技术目标是(1)评估在防腐剂中引入铁磁性颗粒并实现磁标记防腐剂对木材渗透的可行性，(2)评估用涡流测量磁标记防腐剂渗透率和保留率的可行性。***