Experimental study of the determination of E-pH diagram For 304SS on a solution with the addition of bee wax propolis inhibitor

The impact of the inhibitor addition in the form of bwp extract in the corrosive environment was reviewed on the e-ph diagram of 304ss. this steel has a main constituent element such as fe (iron),cr (chromium) and ni. based on the e-ph diagram of cr and ni,it is known that the steel is corrosion resistant,as it will form a passivation layer as a protection from corrosion. e-ph diagram is generally constructed with complex thermodynamic calculations or using a certain software. in this research,the construction of e-ph diagram based on experimental results was conducted. the environment control by using an inhibitor is the one by modifying the environment. this study is a continuation of early research on the characteristics of the extract bwp as a corrosion inhibitor. the addition of inhibitor will change the e-ph diagram of 304ss. the research was conducted by potentiodynamic testing. scan rate used was amounted to 0.001 v/s. the result indicates the presence of e-ph diagram changes with the addition of bwp inhibitor. this study also characterized the thin film surface with atomic force microscopy (afm).