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Method for determining corrosion rate and D-S double-electrolytic-tank experimental device

A technology of corrosion rate and experimental device, applied in measurement devices, weather resistance/light resistance/corrosion resistance, instruments, etc., can solve the problems of long time and cumbersome, and achieve the effect of short time

Pending Publication Date: 2022-07-08
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] From the above, it can be seen that the operation of determining the corrosion rate using the weight loss method is cumbersome and time-consuming

Method used

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  • Method for determining corrosion rate and D-S double-electrolytic-tank experimental device

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Embodiment Construction

[0046] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.

[0047] The embodiment of the present application provides a method for determining the corrosion rate. Since metal corrosion loses electrons, hydrogen can be reduced. For example, during corrosion of sulfur-containing wet gas pipes and equipment, all lost electrons are used to reduce hydrogen. Therefore, the generated electrons can be used to reduce hydrogen. The total amount of hydrogen is used ...

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Abstract

The invention relates to a method for determining a corrosion rate and a D-S double-electrolytic-tank experimental device, and belongs to the technical field of corrosion rate testing. The method comprises the following steps: acquiring the hydrogen flux of diffusible hydrogen at a target position of a test piece to be tested through a hydrogen flux probe; and according to the hydrogen flux of the diffusible hydrogen and a predetermined corrosion rate formula, calculating the corrosion rate of the target position of the test piece to be tested. By adopting the method, the corrosion rate can be determined without using a weight loss method, the method is simple and convenient, and the consumed time is short. Moreover, compared with a weightlessness method, the method does not need to cut a to-be-tested piece for a coupon test, and the method is a nondestructive corrosion monitoring method.

Description

technical field [0001] This application relates to the technical field of corrosion rate testing, in particular to a method for determining corrosion rate and a D-S double electrolytic cell experimental device. Background technique [0002] Corrosion rate (corrosion rate) is an important index to evaluate the uniform corrosion resistance of metal, and the common method for measuring corrosion rate is weight loss method. [0003] The weight loss method is to measure the metal corrosion rate according to the weight change of the metal sample before and after corrosion. In operation, it is necessary to make a sample of a certain shape and size, process the sample, and then place the treated sample in a corrosive environment. After a certain period of time, the corrosion rate can be calculated by taking it out and measuring the change in its weight and size. [0004] It can be seen from the above that the operation of determining the corrosion rate using the weight loss method ...

Claims

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Application Information

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IPC IPC(8): G01N17/02
CPCG01N17/02G01N17/006
Inventor 吴华唐永帆张寅晖杨力曹军沈长寿
Owner PETROCHINA CO LTD
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