THE BEHAVIOR OF Ti GRADE 2 IN DIFFERENT CORROSIVE ACIDIC MEDIA

Abstract

ABSTRACT

Titanium and its alloys are generic class of materials that have widespread applications in aerospace, medical, and oil and gas industries. Besides their excellent properties, corrosion and hydriding problems may arise when titanium base alloys are exposed to environments containing hydrogen. This work concentrates on understanding the effect of strong mineral acids on the corrosion resistance and hydriding of commercially pure titanium grade 2. Three solutions were chosen for this purpose, namely nitric acid, sulfuric acid, and hydrochloric acid. A range of electrochemical open circuit potential (OCP) measurements were used to study the influence of oxide film formed on titanium grade 2 on the corrosion and hydriding behavior in the above mentioned acids. X-ray diffraction and surface morphology examinations were used to study the corrosion and hydriding characteristics. It is found that the passive oxide film formed on titanium can be penetrated by electrochemical dissolution in strongly acidic solutions. The data generated from the lab experiments support published papers, which suggest that the passive film formed on titanium is composed of TiO₂, and is responsible for its electrochemical corrosion resistance in many aggressive corrosion media. https://jer.ly/PDF/Vol-35-2023/JER-07-35-Abstract.php?f=a