Variasi Konsentrasi Inhibitor Kulit Bawang Merah 0 PPM, 100 PPM, 200 PPM, dan 300 PPM terhadap Nilai Laju Korosi Pipa Radiator

This study investigates the effect of adding onion peel extract as a corrosion inhibitor on the corrosion rate and hardness of radiator pipes. The research employed an experimental method with inhibitor concentrations of 0 ppm, 100 ppm, 200 ppm, and 300 ppm. Corrosion rate testing was conducted usin