A wide range of alloys is used for oil and gas applications from carbon steels to nickel based alloys. NACE International provides criteria to select materials mostly based on their resistance to environmental cracking. It was of interest to study the general corrosion rate and passivation characteristics of a wide range of alloys in deaerated 5% NaCl + 0.5% acetic acid (TM0177 Test Solution A). Electrochemical methods such as polarization resistance and electrochemical impedance spectroscopy were used. Results are also analyzed regarding the galvanic corrosion susceptibility of the studied materials.