Laser Raman Spectroscopy for the Study on Corrosion Product of Steels

钢的腐蚀是材料性能的一个重要因素。Since the corrosion products is largely influenced by environment around the steels， the“in-situ”measurements are desirable for analysis of the corrosion products on the steels。目前调查的目的是通过使用激光罗马光谱法来确定一种可用的方法来识别corrosion产品。1 eStandard Raman各种氧化物和氢氧化物的拉曼规格：铁氧化物（ -，-Fe 203，Fe 304）和氢氧化物（ -， -，-FEOOH）的规格已被测量。由于测量了一种新的技术，在氧化物-KBr混合物的一个薄薄的样本中，为了防止改良导致激光照明的热效应而制备了一种不稳定的钢。2）拉曼大气腐蚀产品对铁和低合金钢的特性：该corrosion产品是由拉曼光谱仪在原位细胞上从20 ° c到80 ° c的恒定温度下进行的corrosion在一个沉淀溶液下进行的。在80 ° C中，腐蚀产品是Fe 304的消费者，独立于Aequal solution和钢中的合金元素。初始产品在温度低于50 ° C时-FeOOH，随着时间的推移-Fe 203、Fe 304和-Fe203.3电子实验细胞在高温腐蚀试验基础上进行试验：实验是在大气温度约300 ° C时对钢材进行腐蚀试验的遥感测量。如订购测量该特定物体的位置，远离拉曼光谱仪的远程传感系统是在试验基础上制造的。由于玻璃纤维的光功率损失导致了传输，这是一次测试。

The corrosion of steels is one of the important factors for material performance. Since the corrosion products is largely influenced by environment around the steels, the "in-situ " measurements are desirable for analysis of the corrosion products on the steels. The purpose of the present investigation is establishment of an available method by using laser Roman spectroscopy for identification of the corrosion products. The results are summarized as following.1eStandard Raman spcrtra of various iron oxides and hydroxides: The Raman spectra of the iron oxides ( -, -Fe203, Fe304) and hydroxides ( -, -, -FEOOH) was measured. For the measurement a new technique was introduced, in which a thin sample of the oxide-KBr mixture a few m thick was prepared on stgainless steel for preventing the modification due to heat effect by laser light illumination.2)Raman spectra of atmospheric corrosion products on iron and low alloy steels: The corrosion products was traced by Raman spctroscopy with a in-situ cell at constant temperature from 20 ゜c to 80 ゜c for the corrosion under a droplet of aqueous solution. At 80゜c the corrosion products consist of Fe304, independent of anion in aqueous solution and of alloying element in the steels. At temperature lower than 50゜c the initial product is -FeOOH, changing with time to -Fe203, Fe304, and -Fe203.3eExperimental cell on a trial basis for high temperature corrosion test: an experimental was made for the corrosion test of steels at temperature about 300 ゜c in atmosphere.4)Remote sensing measurement of Raman spectra using glass fiber: In order to measure the specimen located in place far from the Raman spectrometer the remote sensing system was made on a trial basis. The light power loss due to transmission through the glass fiber was examined.