权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of Remote Sensing Apparatus of Raman Spectroscopy for the Corrosion Layer on Metals by use of Optical Fiber

金属腐蚀层光纤拉曼光谱遥感装置的研制

基本信息

批准号：
01850160
负责人：
OHTSUKA Toshiaki
金额：
$ 5.89万
依托单位：
Nagoya Institute of Technology (1990)Hokkaido University (1989)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01850160/
关键词：
Laser Raman Spectroscopy Steel Rust Oxide Hydroxide Remote Sensing Optical Fiber 鋼腐食リモ-ト操作

项目摘要

Introduction : The laser Raman spectroscopy is one of the interesting methods for evaluating the solid surface under the in-situ condition. For an optical measurement of material surface the position of specimen is very restricted on the light path. The use of optical fiber extends the application field of the optical measurement. In the research a remote sensing apparatus of Raman spectroscopy is developed by use of optical fibers for measuring the specimen surface far from the Raman spectrometer.Apparatus : The apparatus consists of a small filter-type double monochrometer connected with the main spectrometer and Ar ion laser optically through two glass fibers. The light from the laser is guided to the sample position by a glass fiber with 0.1mm diameter and the Raman scattering light from the sample is guided to the main spectrometer through the other fiber with 0.4mm diameter after excluding the Payleigh light with the small filter-type monochrometer. The optical loss due to the fiber system decreases the sensitivity by about 1/4 to 1/8.Result : The apparatus was used for the Raman spectroscopic measurement of rust on steel specimens with various shapes. (1) Rust layer formed on the carbon steel with large dimention by dip and drying in NaCl solution. The rust is identified beta-FeOOH. (2) Rust on the cap of the nitrogen gas bamb, which was placed in a laboratory room under atmosphere including small amount of ClD2. From the Raman spectrum of the rust an amorphous iron oxide is detected in the upper part of the bomb and beta-FeOOH and Fe_3O_4 are detected in the lower part. (3) Rust on the cap of a gas stove. The cap was exposed to flame of the gas stove for a long term. Alpha-Fe2OD2 and FeD2OD2 are detected which are stable oxides at a high temperature about 500D1C in air. (4) Rust on a pickel which was left on the balcony in the suburbs of Nagoya city for one and a alf years. Broad Raman peaks are detected which are assigned to those ofgamma -FeOOH.

引言：激光拉曼光谱是在原位条件下评价固体表面的有趣方法之一。在材料表面的光学测量中，样品的位置在光路上受到很大的限制，光纤的使用拓宽了光学测量的应用领域。本研究研制了一种利用光纤对远离拉曼光谱仪的样品表面进行测量的拉曼光谱遥感装置，该装置由小型滤光片型双单色仪通过两根玻璃光纤与主光谱仪和氩离子激光器光学连接组成。激光器发出的光通过一根直径为0.1mm的玻璃光纤引导到样品位置，样品发出的拉曼散射光经小滤光片型单色仪排除瑞利光后，通过另一根直径为0.4mm的光纤引导到主光谱仪。光纤系统的光损耗使灵敏度降低约1/4 ~ 1/8。结果：该装置可用于各种形状钢样上铁锈的拉曼光谱测量。(1)大尺寸碳钢在NaCl溶液中浸泡干燥后形成锈层。锈被鉴定为β-FeOOH。(2)氮气箱盖生锈，将其放置在实验室中含有少量ClD 2的气氛下。从铁锈的拉曼光谱中，在弹的上部检测到无定形氧化铁，在下部检测到β-FeOOH和Fe_3O_4。(3)煤气炉盖上的锈。瓶盖长期暴露在煤气炉的火焰中。α-Fe_2 O_2和Fe_2 O_2在空气中500 ℃左右的高温下是稳定的氧化物。(4)在名古屋郊区的阳台上放置了一年半的咸菜生锈了。宽的拉曼峰被检测到，这是指定的那些ofgamma -FeOOH。