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Device and method for evaluating inhibitor film integrity under scouring work conditions

A corrosion inhibitor film and integrity technology, which is applied in the field of devices for evaluating the integrity of corrosion inhibition films, can solve the problem of lack of fluid wall shear force measurement devices in corrosion evaluation devices, surface corrosion process of difficult-to-test pieces, and lack of on-line corrosion monitoring means And other issues

Inactive Publication Date: 2016-08-03
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Stirring is mainly used to simulate the flow velocity in the pipe, which is difficult to truly reflect the complex flow distribution and scouring conditions in the oil pipe
[0005] (2) The corrosion evaluation device lacks a fluid wall shear force measurement device, and cannot quantitatively investigate the erosion and damage effect of the fluid shear force on the corrosion inhibitor film
[0006] (3) Lack of online corrosion monitoring means, it is difficult to observe the corrosion process on the surface of the test piece online, and monitor the occurrence and development of corrosion online

Method used

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  • Device and method for evaluating inhibitor film integrity under scouring work conditions
  • Device and method for evaluating inhibitor film integrity under scouring work conditions
  • Device and method for evaluating inhibitor film integrity under scouring work conditions

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Embodiment Construction

[0044] A detailed description will be made in conjunction with the drawings and specific embodiments of the present invention.

[0045] A device for evaluating the integrity of a corrosion inhibitor film under scour conditions, such as figure 1As shown, it includes a flow supply circulation unit, a shear force measurement unit, an electrochemical monitoring unit, a camera observation unit, a test piece test unit and a corrosion inhibitor filling unit;

[0046] The flow supply circulation unit is composed of a one-way valve (1), a heating reactor (5), a main control valve (6), an anti-corrosion centrifugal pump (7), a flow control valve (8), a pressure regulator (9), An electromagnetic flowmeter (10) and a transparent plexiglass tube (11) are formed;

[0047] Described shear force measurement unit is made of shear force sensor (12), controller (13) and computer (14);

[0048] Described electrochemical monitoring unit is made of working electrode (17), reference electrode (18)...

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Abstract

The invention discloses a device and method for evaluating inhibitor film integrity under scouring work conditions and belongs to the technical field of petrochemical engineering corrosion and protection. The device comprises a supplied flow circulating unit, a shear force measuring unit, an electrochemical monitoring unit, a camera shooting observation unit, a test piece testing unit and an inhibitor injection unit. By means of the device and method, evaluation of integrity of an inhibitor film can be achieved. Firstly, flow shear force is measured through the shear force measuring unit under different scouring work conditions, the corrosion rate is measured through the test piece testing unit, online corrosion monitoring is conducted through the electrochemical monitoring unit, the surface appearance of a test piece is observed and recorded through the camera shooting observation unit, integrity of the inhibitor film is comprehensively evaluated through data comparison and analysis, critical parameters are obtained when integrity of the inhibitor film is damaged, finally an inhibitor is injected through the inhibitor injection unit so that the inhibitor film can be repaired to be complete, and therefore monitoring and evaluation of stability, damage and repair of the inhibitor film are achieved.

Description

technical field [0001] The invention belongs to the technical field of petrochemical corrosion and protection, and in particular relates to a device and a method for evaluating the integrity of a corrosion inhibition film under different scouring conditions. Background technique [0002] In the process of oil and gas production, the inner wall of the pipeline is usually coated with a corrosion inhibitor, and the corrosion inhibitor is continuously injected to prevent internal corrosion of the oil pipeline. Usually, the corrosion inhibitor must be attached to the surface of the material to form a complete protective film in order to play a good protective role. When the corrosive medium flows in the pipeline, it will have a fluid scouring effect on the wall surface, and the shear force on the wall surface may destroy the integrity of the corrosion inhibitor film, resulting in the loss of the protective effect of the corrosion inhibitor. The protective effect of corrosion inh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56G01N5/00G01N17/02G01N21/84
CPCG01N3/567G01N5/00G01N17/02G01N21/84
Inventor 曾德智李皓张恩搏董宝军张乃艳喻智明何奇垚张智钟显康施太和
Owner SOUTHWEST PETROLEUM UNIV
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