Corrosion Behavior of Epoxy (Sigmaline) Coated X65 Steel in some : Current School News

Corrosion Behavior of Epoxy (Sigmaline) Coated X65 Steel in some Selected Corrosive Media

Corrosion Behavior of Epoxy (Sigmaline) Coated X65 Steel in some Selected Corrosive Media.


Like any industry, the economic success of the oil and gas industry can be no swifter than its success in corrosion control/prevention.

Some oil and gas industries operate in hostile offshore environment that harbors significantly quite substantially different corrosive agents including ions of chloride, Cl, bicarbonate (HCO3), hydrogen sulfide (HS), sulfide (S), etc., coupled with gases such as oxygen (O2), carbon dioxide (CO2), just to name a few.

Oil and gas structural materials and pipeline steels are made of metals. The interaction amongst these metals and between the metals and the aforementioned corrosive agents in seawater water environment causes metallurgy in-reverse (corrosion) with time. The result of the corrosion process leads to rusting and subsequently, failure of the materials.

Understanding the effects different corrosive environments have on materials deterioration doesn’t only drive a better understanding of corrosion control methods and mitigation techniques but also play a pivotal role in preventing oil and gas offshore platform from corrosion attacks.

The protection and safety such understanding offers to human and marine lives cannot be overemphasized. Billions of dollars can also be lost by poor corrosion management strategies. Although “corrosion prevention” is an overstatement as this research is concern, “corrosion control” is the diction of choose.

Different corrosion control methods including cathodic protection, coating, etc., are possible but epoxy coating was considered for the purpose of this research. An analysis of the corrosion behavior of X65 steel samples coated with epoxy (sigmaline), was carried out in some selected corrosive media of different concentrations.


The demand for energy has continue to drive enhanced recovery and technological sources[1,2] including solar panels, organic light emitting devices, petrochemical products, etc., with petroleum being demanded the most World-wide[3] according to figure 1.1.

Being the major demand of energy source, petroleum recovery, its transportation, and storage still remain a serious challenge through metal pipelines subject to failure in corrosive environments[4,5]

However, this demand has not only driven lucrative investments in new pipeline designs, but  has also challenged scientists and engineers involved with both researching and providing pipeline coatings to address protection requirements in corrosive environments that traditional coatings technologies cannot provide [6].

Most of oil and gas pipelines, valves, bolts, and other structural materials are made of metals that once existed in nature as stable ores, carbonates, or sulfides [1].

During metallurgical extraction process of ores, the refined metal absorbs a tremendous quantity of energy (unstable state), and corrosion is the natural means of releasing the high energy, thus reversing the metal to its initial low energy stable state [7].

Thus, preventing this reversible process, and hence, preventing oil and gas pipeline structures from corroding is very crucial to the petroleum industries whose products power a vast majority of the World’s manufacturing industries, transportation, and also serve as energy source in homes.


Brondel, R. Edwards, A. Hayman, D. Hill, S. Mehta, and T. Semerad, “Corrosion in the Oil Industry,” pp. 4–18.

Smith, T. Siewert, B. Mishra, D. Olson, and A. Lassiegne, Coatings for Corrosion Protection : Offshore Oil and Gas Operation Facilities ,. 2004, p. 334.

I. Ossai, “Advances in Asset Management Techniques: An overview of corrosion Mechanisms and Mitigation Strategies for Oil and Gas Pipelines,” Hindawi Publishing Corporation -ISRN Corrosion, vol. 2012, p. 10, 2012.

R. Freeman and M. Metallurgy, “Analysis and Prevention of Corrosion-Related Failures,” vol. 2, no. Eq 3, 2002.

Place, “Managing Corrosion of Pipelines that Transport Crude Oils,” vol. 52, no. 5, pp.28–35, 2013.

Guan, “New Challenges and Developments in Pipeline Coatings.”

CSN Team.

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