Electrochemical Impedance Spectroscopy (EIS) Studi pada Mekanisme Inhibisi Corrosion Inhibitor Berbasis Imidazoline pada A106 GR.B Karena Pengaruh Korosi Co2 di Dalam Lingkungan 3% NaCl = Electrochemical Impedance Spectroscopy (EIS) Study on Mechanism of Imidazoline-Based Corrosion Inhibitor Applied in A106 GR.B From The Effect of Co2 Corrosion in 3% NaCl Environment.