Mohsen Achour

A Novel Method to Mitigate the Top-of-the-Line Corrosion in Wet Gas Pipelines by Corrosion Inhibitor within a Foam Matrix

Top-of-the-line corrosion (TLC) has been a serious issue for the oil and gas industry. Conventional inhibition techniques are expensive and often do not seem to provide enough protection to the steel surface at the top of the pipe. A novel idea is to inject the corrosion inhibitor within a foam matrix. The foam slug is formed first at an injection port and carried along the pipe by the gas phase. This process ensures homogeneous delivery of the inhibitor to the pipe wall along pipe sections suffering from TLC. This paper presents a comprehensive study performed in an innovative glass cell setup which consisted of a foaming cell and a corrosion cell to simulate intermittent contact between the foam and the steel surface. Corrosion measurements were performed using electrochemical techniques (electrochemical impedance spectroscopy [EIS], linear polarization resistance [LPR], potentiodynamic sweep) and electrical resistance (ER) measurements to determine the inhibitive performance of investigated inhibitor t...

CO2 corrosion of mild steel

The current state of understanding of CO 2 corrosion as related to internal corrosion of oil and gas pipelines made from mild steel is reviewed. The review covers the effects of basic physicochemical phenomena underlying CO 2 corrosion, such as surface electrochemistry, homogenous aqueous chemistry, mass transfer, and formation of protective corrosion product layers. It then addresses some of the main “complicating factors,” such as multiphase flow, additional aqueous species, hydrocarbon composition, inhibition, and localized corrosion. Additional challenges seen in the field are presented at the end.

34 – Mathematical modeling of uniform CO2 corrosion

The uniform carbon dioxide corrosion is one of the most widely studied subjects in corrosion science and engineering. Numerous corrosion rate–predictive models have been developed and reported in the literature over the past few decades. In this chapter, these models are grouped in four categories of empirical, semiempirical, elementary mechanistic, and comprehensive mechanistic, based on the mathematical methods and the calculation approach used to quantify the underlying physiochemical processes. With the focus on the mechanistic models, some key publications are reviewed, and the advantages and limits for each type of the models are discussed. Furthermore, a collection of the relevant mathematical expressions as well as solution methods required to construct the mechanistic models is provided.

Evaluation of a Novel Top-of-the-Line Corrosion (TLC) Mitigation Method in a Large Scale Flow Loop

Innovative top-of-the-line corrosion (TLC) inhibition techniques are being investigated as an alternative to batch treatment. A novel idea consists of injecting the corrosion inhibitor within a foa...

High Temperature Corrosion Studies in Simulated SAGD Produced Fluids

Heavy oil extraction using steam flooding methods, such as steam assisted gravity drainage (SAGD), has been used for several decades; yet no severe corrosion damage has been reported despite the pr...

7 – CO2 corrosion of mild steel

The current state of understanding of CO 2 corrosion as related to internal corrosion of oil and gas pipelines made from mild steel is reviewed. The review covers the effects of basic physicochemical phenomena underlying CO 2 corrosion, such as surface electrochemistry, homogenous aqueous chemistry, mass transfer, and formation of protective corrosion product layers. It then addresses some of the main “complicating factors,” such as multiphase flow, additional aqueous species, hydrocarbon composition, inhibition, and localized corrosion. Additional challenges seen in the field are presented at the end.

CO 2 corrosion of mild steel

The current state of understanding of CO 2 corrosion as related to internal corrosion of oil and gas pipelines made from mild steel is reviewed. The review covers the effects of basic physicochemical phenomena underlying CO 2 corrosion, such as surface electrochemistry, homogenous aqueous chemistry, mass transfer, and formation of protective corrosion product layers. It then addresses some of the main “complicating factors,” such as multiphase flow, additional aqueous species, hydrocarbon composition, inhibition, and localized corrosion. Additional challenges seen in the field are presented at the end.