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Novel Multi-Electrode Test Method for Evaluating Inhibition of Underdeposit Corrosion-Part 2: Sour Conditions

机译:评估沉积不足腐蚀抑制的新型多电极测试方法-第2部分:酸性条件

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摘要

In the first part of this two-part paper we reported on the development of a novel test method to evaluate the performance of inhibitors for underdeposit corrosion under sweet (carbon dioxide [CO2]) conditions for oil and gas applications. The use of a multi-electrode array enables examination of the effect of varying degrees of precorrosion during a single test and highlights statistical variations in corrosion rate that might be missed by other methods. This paper describes the application of the test method to sour (hydrogen sulfide [H^sub 2^S]) conditions, where autoclave testing is required to deal with the elevated pressure. Tests on two different inhibitors were carried out in an autoclave containing a simulated Forties brine at 60° C with two different CO^sub 2^/H^sub 2^S partial pressure ratios. Effective discrimination of inhibitor performance was more readily achieved at lower partial pressures of H^sub 2^S. At higher partial pressures of H^sub 2^S, the iron sulfide film formed very readily and was so protective as to render distinction of comparative inhibitor performance unfeasible. [PUBLICATION ABSTRACT]
机译:在这个由两部分组成的论文的第一部分中,我们报告了一种新颖的测试方法的开发,该方法用于评估在石油和天然气应用中在甜(二氧化碳[CO2])条件下欠沉积腐蚀抑制剂的性能。使用多电极阵列可以检查单个测试过程中不同程度的预腐蚀的影响,并突出显示其他方法可能会漏掉的腐蚀速率的统计变化。本文介绍了该测试方法在酸性(硫化氢[H ^ sub 2 ^ S])条件下的应用,在该条件下需要进行高压釜测试以应对升高的压力。在装有模拟四十年代四十盐水的高压釜中,在两种不同的CO 2 / H 2 / S 2分压比的高压釜中进行了两种不同抑制剂的测试。在较低的H 2的分压下,更容易实现抑制剂性能的有效区分。在较高的H 2的分压下,硫化铁膜非常容易形成并且具有保护性,以致无法区分比较抑制剂的性能。 [出版物摘要]

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  • 来源
    《Corrosion》 |2010年第5期|p.1-6|共6页
  • 作者

    G Hinds A Turnbull;

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    G. Hinds[double dagger],* and A. Turnbull*Submitted for publication October 9, 2009, In revised form, December 17, 2009. Part 1 of this manuscript appears in CORROSION 66, 4 (2010), p. 046001-1 to 046001-10.[double dagger] Corresponding author. E-mail: gareth.hlnds@npl.co.uk.* National Physical Laboratory, Hampton Road, Teddington, Middlesex, TW11 0LW, United Kingdom.,;

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