#TITLE_ALTERNATIVE#

• Main Author: RENOVA FARMAJANTI (NIM 20506056), EVI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/7847
• Institution: Institut Teknologi Bandung

Metal corrosion is everyday phenomenon of which can not be avoided and is assumed as common thing. Though, loss generated as result of corrosion is not affects in material only, but can hazard soul. Given well the corrosion warning sign, expected useful for ownself at least and we are be able to treat more wise metal of object. Awareness of corrosion also need to be inculcated in learning so students can be invited to participitate for minimize corrosion national loss. This research was measured corrosion rate of copper. The corrosion rate of copper in aqua regia solution was measured using three methods, namely corrosion wheel test, resistance measurements and Tafel polarization curve. Corrosion wheel test and Tafel could show the influence of pH and inhibitor, however resistance measurements results did not agreed well with forementioned methods, as this was suspected that there were lost of copper oxide from the metal surface. Corrosion rate increased as the decrease of pH of aqua regia because the increase in H+ ions concentration will depolarize the anodic process. Corrosion wheel test and Tafel methods could describe the corrosion process qualitatively and quantitatively. However, it can be concluded that Tafel methods have higher precission compare to corrosion wheel test and resistance measurements. Corrosion wheel test will be used as experimental module, as it is considered to be simpler, safer and cheaper. The drawback of this method needs more time to run compare to Tafel methods. The electronic version were placed in an online learning system called Modular Object Oriented Dynamic Learning Environment (Moodle), to acquire feedback from users. Moodlle hopefully could increase students' motivations, improve their understanding of concepts and principles in electrochemistry. Moodle can be accesed at http://courses.fmipa.itb.ac.id