Wireline Cable: Corrosion of Galvanized Armor Wires in Aqueous Drilling Fluids

作者：Evgeny Barmatov, John Staniland, Jack Stoney, Setya Perwira Putra, Madhuri Gummadi, Anatoly Medvedev, Trevor Hughes · 年份：2024 · DOI：10.5006/c2024-20674 · 被引用次数：2 · 研究领域：Corrosion Behavior and Inhibition、Hydrogen embrittlement and corrosion behaviors in metals、Concrete Corrosion and Durability

Abstract This paper describes a methodology for the investigation of corrosion of galvanized armor wires used in the construction of wireline logging cables. The methodology involves a detailed characterization of the wires to determine the characteristics of the zinc coating and Zn/Fe alloy zones. Model brine solutions and fully formulated drilling fluids were used to quantify the corrosion of galvanized armor wires in the aqueous fluid system (AFS) using weight-loss analysis and electrochemical techniques. A novel corrosion test protocol was developed to accurately measure both zinc dissolution and surface oxidation of the zinc coating. The degradation of the zinc coating was determined as a function of brine composition, oxygen concentration, pH, and temperature. The effectiveness of a grease coating applied to the wire sample surfaces prior to exposure to the brine was evaluated.