Quantitative Transient Analysis of Localized Corrosion
    3.
    发明申请
    Quantitative Transient Analysis of Localized Corrosion 失效
    定位腐蚀定量瞬态分析

    公开(公告)号:US20080283418A1

    公开(公告)日:2008-11-20

    申请号:US12116003

    申请日:2008-05-06

    IPC分类号: G01N17/04

    CPC分类号: G01N17/02

    摘要: An electrochemical noise method, apparatus and system may be used to estimate and/or calculate parameters of interest related to corrosion rates of an electrically conductive article. The apparatus involves a working electrode (having substantially the same composition of the electrically conductive article), a reference electrode, and a counter electrode in an environment of interest. The working electrode is placed under potentiostatic control. A current transient between the working electrode and the counter electrode is measured. The working electrode is switched to open potential. A potential transient is measured over the duration of a localized corrosion event. The localized corrosion may then be calculated based on the measured potential transient and the current transient.

    摘要翻译: 可以使用电化学噪声方法,装置和系统来估计和/或计算与导电制品的腐蚀速率相关的感兴趣参数。 该设备包括在感兴趣的环境中的工作电极(具有基本相同的导电制品组成),参考电极和对电极。 工作电极置于恒电位控制下。 测量工作电极和对电极之间的电流瞬变。 工作电极切换到开放电位。 在局部腐蚀事件的持续时间内测量潜在的瞬态。 然后可以基于测量的电位瞬变和电流瞬态来计算局部腐蚀。

    Quantitative, real time measurements of localized corrosion events
    6.
    发明申请
    Quantitative, real time measurements of localized corrosion events 失效
    局部腐蚀事件的定量,实时测量

    公开(公告)号:US20060144719A1

    公开(公告)日:2006-07-06

    申请号:US11262861

    申请日:2005-10-31

    IPC分类号: G01N27/26 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式进行电位扫描; 在第一时段期间测量测试电极相对于参考电极的电流v电位(极化电阻,R BAT)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RΔPΔV/ΔI确定ΔI,其中在第二时间段内测量DeltaV; 并从测量的电位和当前数据计算局部腐蚀。

    Mercaptoalcohol corrosion inhibitors
    7.
    发明授权
    Mercaptoalcohol corrosion inhibitors 失效
    巯基醇腐蚀抑制剂

    公开(公告)号:US06365067B1

    公开(公告)日:2002-04-02

    申请号:US09636095

    申请日:2000-08-10

    IPC分类号: C23F1116

    CPC分类号: C09K8/54 C23F11/10 C23F11/161

    摘要: Compositions and methods have been discovered for inhibiting corrosion of metals, particularly iron alloys, in contact with fluids, either hydrocarbons, alcohols, or aqueous fluids, employing mercaptoalcohols. The mercaptoalcohols should have at least one water solubilizing hydroxyl group. In particular, suitable mercaptoalcohols have the formula: (HS)n—R—(OH)m where R is a straight, branched, cyclic or heterocyclic alkylene, arylene, alkylarylene, arylalkylene, or hydrocarbon moiety having from 1 to 30 carbon atoms; n and m each independently averages from 1 to 3; and the heteroatom in the heterocyclic moiety substituent, if present, may be N, O, S and/or P. Preferred mercaptoalcohols include 2-mercaptoethanol, 2-mercaptopropanol, 1-mercapto-2-propanol, and 2-mercaptobutanol, in part because they are soluble in many fluids. These corrosion inhibitors show improved inhibition of both generalized and localized corrosion, specifically in high shear and high flow environments.

    摘要翻译: 已经发现了组合物和方法,用于抑制金属,特别是铁合金与使用巯基醇的流体,烃,醇或含水流体接触的腐蚀。 巯基醇应具有至少一个水溶性羟基。 特别地,合适的巯基醇具有下式:其中R是具有1至30个碳原子的直链,支链,环状或杂环亚烷基,亚芳基,亚烷基亚芳基,芳基亚烷基或烃部分; n和m各自独立地平均为1至3; 杂环部分取代基中的杂原子(如果存在)可以是N,O,S和/或P.优选的巯基醇部分包括2-巯基乙醇,2-巯基丙醇,1-巯基-2-丙醇和2-巯基丁醇 因为它们可溶于许多液体。 这些腐蚀抑制剂显示出对广义和局部腐蚀的改善的抑制,特别是在高剪切和高流动环境中。

    Localized corrosion monitoring device for limited conductivity fluids
    9.
    发明授权
    Localized corrosion monitoring device for limited conductivity fluids 有权
    局部导电流体腐蚀监测装置

    公开(公告)号:US08133383B2

    公开(公告)日:2012-03-13

    申请号:US12356695

    申请日:2009-01-21

    IPC分类号: G01F1/64

    CPC分类号: G01N17/04

    摘要: A localized corrosion monitoring (LCM) device is modified to obtain polarization resistance (Rp) from electrical resistance of a probe having a strip of metal under investigation (test electrode), a reference electrode and a temperature sensor (e.g. thermocouple). This configuration allows the probe to be used in areas where only a thin film of conductive fluid is available or required to provide potential monitoring. Thus, the applicability of the LCM technique is broadened. All the above devices are expected to be configured in one item of equipment, except for the probe which may be remotely located from the rest of the equipment.

    摘要翻译: 修改局部腐蚀监测(LCM)装置以从具有正在研究的金属条(试验电极),参考电极和温度传感器(例如热电偶)的探针的电阻获得极化电阻(Rp)。 该配置允许探针用于只有导电流体薄膜可用或需要提供潜在监测的区域。 因此,LCM技术的适用性得到拓宽。 预期所有上述设备都将配置在一个设备项目中,除了可能远离设备其余部分的探头。

    Quantitative transient analysis of localized corrosion
    10.
    发明授权
    Quantitative transient analysis of localized corrosion 失效
    局部腐蚀的定量瞬态分析

    公开(公告)号:US07713405B2

    公开(公告)日:2010-05-11

    申请号:US12116003

    申请日:2008-05-06

    IPC分类号: G01N17/04

    CPC分类号: G01N17/02

    摘要: An electrochemical noise method, apparatus and system may be used to estimate and/or calculate parameters of interest related to corrosion rates of an electrically conductive article. The apparatus involves a working electrode (having substantially the same composition of the electrically conductive article), a reference electrode, and a counter electrode in an environment of interest. The working electrode is placed under potentiostatic control. A current transient between the working electrode and the counter electrode is measured. The working electrode is switched to open potential. A potential transient is measured over the duration of a localized corrosion event. The localized corrosion may then be calculated based on the measured potential transient and the current transient.

    摘要翻译: 可以使用电化学噪声方法,装置和系统来估计和/或计算与导电制品的腐蚀速率相关的感兴趣参数。 该设备包括在感兴趣的环境中的工作电极(具有基本相同的导电制品组成),参考电极和对电极。 工作电极置于恒电位控制下。 测量工作电极和对电极之间的电流瞬变。 工作电极切换到开放电位。 在局部腐蚀事件的持续时间内测量潜在的瞬态。 然后可以基于测量的电位瞬变和电流瞬态来计算局部腐蚀。