Method of determination of corrosion rate

    公开(公告)号:US20060063263A1

    公开(公告)日:2006-03-23

    申请号:US10946049

    申请日:2004-09-21

    IPC分类号: G01N31/22

    CPC分类号: G01N17/00

    摘要: The corrosion rate of a metal immersed in a fluid medium is measured by transmission of a beam of radiation normally in the visible or near infra-red portion of the spectrum, through a thin film of the metal immersed in the medium. The film of the metal is suitably supported on a radiation-transmitting substrate such as a glass plate or slide. The corrosion rate can be determined by passing a radiation beam through the metal film sample using a twin beam system to compensate for instrument factors such as the absorbance by the fluid medium, the cell windows and the film-supporting substrate. As the thickness of the film decreases, the reduction in film thickness is determined by the increase in beam intensity, using a reference beam to compensate for the instrument factors.