公开(公告)号：US07686938B2

公开(公告)日：2010-03-30

申请号：US11262861

申请日：2005-10-31

申请人： Raymond Paul Gill ,  Vladimir Jovancicevic ,  Wai Yeung Mok ,  Paul Hammonds

发明人： Raymond Paul Gill ,  Vladimir Jovancicevic ,  Wai Yeung Mok ,  Paul Hammonds

IPC分类号： G01N17/04

CPC分类号： G01N17/02

摘要： An electrochemical noise method, apparatus and system calculates parameters of interest related to corrosion rates of an electrically conductive article. The method involves placing a test electrode, a reference electrode, and an auxiliary electrode in an environment of interest; placing the test electrode under potentiostatic control regime for a potential scan; measuring the relationship of current v. potential (polarization resistance, Rp) of the test electrode relative to the reference electrode during a first period; switching from potentiostatic control to the open circuit potential (OCP) of the test electrode; monitoring the OCP of the test electrode during a second period; determining ΔI from the relationship Rp=ΔV/ΔI, where ΔV is measured over a second period of time; and calculating the localized corrosion from the measured potential and current data.

摘要翻译： 电化学噪声方法，装置和系统计算与导电制品的腐蚀速率有关的参数。 该方法包括在感兴趣的环境中放置测试电极，参考电极和辅助电极; 将测试电极置于恒电位控制方案下进行电位扫描; 测量在第一周期期间测试电极相对于参考电极的电流v电位（极化电阻Rp）的关系; 从恒电位控制切换到测试电极的开路电位（OCP）; 在第二期间监测测试电极的OCP; 根据关系Rp =＆Dgr; V /＆Dgr; I，其中＆Dgr; V在第二时间段内测量并确定Dgr; I; 并从测量的电位和当前数据计算局部腐蚀。

公开(公告)号：US07622030B2

公开(公告)日：2009-11-24

申请号：US11499630

申请日：2006-08-04

申请人： Raymond Paul Gill ,  Vladimir Jovancicevic ,  Wai Yeung Mok ,  Paul Hammonds

发明人： Raymond Paul Gill ,  Vladimir Jovancicevic ,  Wai Yeung Mok ,  Paul Hammonds

IPC分类号： G01N17/04 ,  G01R27/08 ,  G01N27/00

CPC分类号： G01N17/02

摘要： Simultaneous determination of general corrosion and localized corrosion rate measurements is achieved with polarization applied by the electrodes themselves rather than externally applied polarization. Two or more working electrodes may be galvanically coupled. A localized pitting corrosion event on one of the electrodes will lead to a potential transient. The area within the potential transient is measured with the baseline being the initial starting potential. This gives localized corrosion as a function of time. The relationship Rp=ΔV/ΔI is calculated, where Rp is the polarization resistance of the working electrodes and is a measure of generalized corrosion rate.

摘要翻译： 通过电极自身施加的极化而不是外部施加的极化来实现一般腐蚀和局部腐蚀速率测量的同时测定。 两个或多个工作电极可以电耦合。 其中一个电极上的局部点腐蚀事件将导致潜在的瞬变。 以基线为初始起始电位来测量潜在瞬态内的面积。 这使得局部腐蚀作为时间的函数。 计算关系Rp = DeltaV /ΔI，其中Rp是工作电极的极化电阻，并且是广义腐蚀速率的量度。