Inhibition of mild steel corrosion in CO2 and H2S‐saturated acidic media by a new polyurea‐based material. Issue 4 (19th November 2019)

• Record Type: Journal Article
• Authors: Abdulazeez, Ismail; Al‐Hamouz, Othman Charles S.; Khaled, Mazen; Al‐Saadi, Abdulaziz A.
• Is Part Of: Materials and corrosion. Volume 71:Issue 4(2020)
• Page Start: 646
• Page End: 662
• Publication Date: 2019-11-19
• Subjects: adsorption -- corrosion inhibitor -- density‐functional theory -- mild steel -- polyurea; Materials -- Periodicals; Metals -- Periodicals; Corrosion and anti-corrosives -- Periodicals; 620.1122305
• DOI: 10.1002/maco.201911270
• Languages: English
• ISSNs: 0947-5117

Abstract

Abstract: Oil well acidizing is a common practice used to boost oil well productivity in the industry. This practice, however, exposes the mild steel components of the wells to extremely harsh corrosive environments. Under such conditions, highly efficient inhibitors are used to minimize corrosion attack. In the present study, corrosion inhibition of mild steel in simulated acidic medium saturated with CO2 and H2 S gases by a newly synthesized polyurea‐based material (PUCorr‐1) was investigated. Electrochemical studies supported with quantum chemical density‐functional theory calculations and surface characterization revealed that PUCorr‐1 adsorbs onto mild steel through a chemisorption mechanism yielding a stable protective film. The polyurea exhibited an excellent efficiency of 99.9% at a temperature of 50°C and a low concentration of 100 ppm, yielding a corrosion current density of 0.3 µA/cm 2 . In the presence of CO2 and H2 S gases, PuCorr‐1 exhibited a remarkable performance (>93% efficiency) making it a potential corrosion inhibitor in industrial processes that involve the use of acid solutions in the presence of CO2 and H2 S gases. Abstract : A new polyurea‐based material (PUCorr‐1) for corrosion protection of mild steel in acidic medium was successfully synthesized. Electrochemical corrosion measurements supported with density‐functional theory calculations revealed that PUCorr‐1 adsorbs onto mild steel through a chemisorption process forming a stable protective film. Corrosion resistance of mild steel in the presence of the polymer increases with increasing temperature