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    • 1. 发明授权
    • Corrosion rate meter
    • 腐蚀率计
    • US3661750A
    • 1972-05-09
    • US3661750D
    • 1969-08-28
    • PETROLITE CORP
    • WILSON HOMER M
    • G01N17/02G01N27/46
    • G01N17/02
    • A corrosion rate meter with metallic electrodes contactable by a corrodent, including a test specimen electrode, a reference electrode, and a third or auxiliary electrode. A source of direct current passes between the test and third electrodes, at selected intervals, a predetermined. relatively constant current whereby a polarization potential is created between the test and reference electrodes. An isolation amplifier; with an input circuit between the test and reference electrodes, provides in its output circuit an output signal representative of the potential difference between these electrodes. A signal correction means applies a corrective signal to the input circuit of the isolation amplifier. The corrective signal removes from the output signal of the isolation amplifier any components representing the potential difference present between the test and reference electrodes intermediate the intervals of current flow creating the polarization potential. A readout means connected to the output circuit of the isolation amplifier to measure the output signal representative of the polarization potential (and corrosion rate) created between the test specimen and reference electrodes.
    • 3. 发明授权
    • D.C. system for conductivity measurements
    • 电导率测量系统
    • US3924175A
    • 1975-12-02
    • US44699374
    • 1974-02-28
    • PETROLITE CORP
    • WILSON HOMER M
    • G01R27/22G01N17/00G01N27/06G01N27/42
    • G01N27/06
    • A d.c. system for measurement of conductivity of an electrolyte. Four side-by-side metallic electrodes serve as auxiliary electrodes for passing current through the electrolyte and reference electrodes for monitoring polarization potential increment. Conductors form separate electrical circuits with the electrodes. A current source passes a measurable amount of direct current between the auxiliary electrodes for inducing a change in polarization potential between the reference electrodes which incremental change in polarization potential is measured. A comparator controls the current source to provide the certain measurable amount of direct current. A readout device senses the direct current passed between the auxiliary electrodes, and the certain measurable amount of direct current is proportional to the conductivity of the electrolyte.
    • 一个d.c. 用于测量电解质的导电性的系统。 四个并排金属电极用作辅助电极,用于使电流通过电解质和用于监测极化电位增量的参考电极。 导体与电极形成分离的电路。 电流源在辅助电极之间传递可测量的直流电流,用于引起参考电极之间极化电位的变化,从而测量极化电位的增量变化。 比较器控制电流源提供一定可测量的直流电流。 读出装置检测在辅助电极之间通过的直流电流,并且某些可测量的直流电流与电解质的导电率成比例。
    • 5. 发明授权
    • Corrosion rate meter
    • US3661751A
    • 1972-05-09
    • US3661751D
    • 1969-10-30
    • PETROLITE CORP
    • WILSON HOMER M
    • G01N17/02G01N27/46
    • G01N17/02
    • A corrosion rate meter with test specimen, reference and third electrodes contactable by a corrodent. An isolation amplifier provides an output signal representation of the potential difference between the test and reference electrodes. An output amplifier produces output current having a predetermined relationship to this output signal and a reference current signal representing a certain polarization potential to be established between the test and reference electrodes. A signal correction means stores an integrated corrective signal derived from the current from the output amplifier. The corrective signal adjusts the output signal of the isolation amplifier for a component representing the potential difference between the test and reference electrodes but not the polarization potential component which removes the reference current signal. Then, the output amplifier passes current between the test and third electrodes to produce a polarization potential between the test and reference electrodes. The output signal from the isolation amplifier is now free of both corrective signal components to control the output amplifier to that current magnitude creating the certain polarization potential between the reference and test electrodes. A readout means measures the output current from the output amplifier which is representative of the corrosion rate occurring at the test electrode.
    • 6. 发明授权
    • Probe body for corrosion tests
    • 探测腐蚀试验机
    • US3639876A
    • 1972-02-01
    • US3639876D
    • 1970-07-28
    • PETROLITE CORP
    • WILSON HOMER M
    • G01N17/02G01N27/30B01K3/00H01C7/00
    • G01N17/02G01N27/286
    • A metallic probe body formed of a pipe plug with an upper cylindrical cavity intersected by lower passageways carrying insulating members. Metallic terminal pins extend through these members for mounting field-replaceable electrodes in a side-byside relationship. An electrical fitting is secured to the top portion of the plug for enclosing the cavity. Electrically conductive means in the cavity interconnect the electrical fitting and the pins. The conductive means are insulated from one another and the probe body. The probe body may be readily installed in any piping system carrying corrosive fluids without introducing any weakness into such piping. The pipe plug subcomponent of the probe body can be manufactured by available pipefitting techniques.
    • 由具有上圆柱形腔的管塞形成的金属探针体与通过承载绝缘构件的下通道相交。 金属端子引脚延伸穿过这些构件,用于以并排关系安装现场可更换电极。 电气配件固定到插头的顶部以封闭空腔。 空腔中的导电装置将电气配件和销钉互连。 导电装置彼此绝缘并且探针体。 探头主体可以容易地安装在任何带有腐蚀性流体的管道系统中,而不会将任何弱点引入到这种管道中。 探头主体的管塞子部件可以通过可用的管道接头技术制造。
    • 9. 发明授权
    • Bipolar log converter
    • 双极对数转换器
    • US3928774A
    • 1975-12-23
    • US49444374
    • 1974-08-05
    • PETROLITE CORP
    • WILSON HOMER M
    • G01N17/02G01N27/48G06G7/24G06G7/12
    • G01N17/02G01N27/48G06G7/24
    • A bipolar log converter capable of receiving bidirectional current I and providing (a) a continuous potential signal having a polarity representative of the flow direction of the current, (b) the potential signal having a magnitude representative of the current, and (c) the potential signal changing polarity upon a change in the flow direction of the current. This converter is especially useful in a novel dynamic analyzer for evaluation of voltage-current related properties in an external system and, in a particular application, to a unique potentiostat employed in performing electrochemical analysis of corrosion phenomena in a test cell. The bipolar log converter employs a unique voltage network or bridge using series connected rectifier pair biased into a conducting state. The bidirectional current I flows in only one rectifier to produce a conversion logarithmically into a potential. This potential in the network produces at its output a potential signal + OR - V I. Temperature compensation for the network is also disclosed.
    • 一种能够接收双向电流I并提供(a)具有表示电流的流动方向的极性的连续电位信号的双极对数转换器,(b)具有代表电流的幅度的电位信号,以及(c) 随着电流流向的变化,电位信号变化极性。 该转换器在用于评估外部系统中的电压 - 电流相关性能的新型动态分析仪中特别有用,并且在特定应用中,用于在测试电池中进行腐蚀现象的电化学分析中使用的独特的恒电位仪。
    • 10. 发明授权
    • Corrosion rate meter
    • 腐蚀率计
    • US3616417A
    • 1971-10-26
    • US3616417D
    • 1969-08-13
    • PETROLITE CORP
    • WILSON HOMER M
    • G01R19/08G01N17/00G01N17/02G01N27/26G01N27/46
    • G01N17/02
    • A corrosion rate meter with metallic electrodes contactable by a corrodent, including a test specimen electrode, a reference electrode and a third or auxiliary electrode. A current loop circuit connects the test specimen and third electrodes to a first input and common output of a differential amplifier and a direct current supply means. Polarizing current in the current loop circuit passes through the third electrode and the test specimen electrode to produce an exponential voltage change at the test specimen electrode with a time constant of resistance and capacitance about this electrode. A voltage loop circuit connects the test specimen electrode and the reference electrode between the first and second inputs of the differential amplifier. A signal generating source in the voltage loop circuit produces a voltage signal changing exponentially from a first value to a second value with the resistance-capacitance time constant characteristic of the polarizing voltage change at the test specimen electrode. The voltage signal and polarizing voltage change combine as an input signal across the first and second inputs of the differential amplifier to produce the polarizing current flow in the current loop circuit at a substantially constant value until a predetermined polarizing voltage is generated at the test specimen electrode. Means provide a readout of the constant value of current flow through the test specimen electrode and the third electrode while the voltage signal is changing exponentially. The value of current flow can be correlated to the corrosion rate of the test specimen electrode.