The purpose of this project was to find out how pH level affects corrosion rate. The hypothesis was that if the pH level affected the rate of corrosion, then the lower the pH level, the faster the rate of corrosion. This will happen because liquids below the pH level of 7 possess stronger acidic attributes. The effect of pH level on corrosion rate was determined by depositing a copper dime into each of three plastic cups, then three different liquids based on their pH levels were assigned to be moved into each cup formulating a reaction chemistry to observe. The results collected during this investigation contradicted the expected result, this experiment was conducted to determine the corrosion rate; Dana Puti Vingear (pH level: 4.5) 4 2/3 days, Tropicana Orange Juice (pH level: 3.88) 6 1/3 days and Sprite (pH level: 3.4) 8 days. The results showed that the hypothesis was refuted. This happened because the preconceived idea was that the liquid with the lowest pH; Sprite would have the fastest corrosion rate. Dana Puti vinegar had the fastest corrosion rate, proving the claim wrong, it was found to contain ethanoic acid; acid containing double the amount of carbon dioxide as a normal acid. To further understand this topic, future research could include; How does the amount of liquid incorporated affect the corrosion rate, how does the temperature of the liquid affect the corrosion rate, and how does the purity of the iron affect the corrosion rate? Previous Research Items corrode when near liquid; water and oxygen, these compounds and elements are essential for corrosion to occur. Corrosion is the result of oxidation; when an element corresponds to oxygen. For example, when the element;... in the center of the paper......the corrosion rate, the lower the pH level, the faster the corrosion rate. This will happen because if the pH level of a liquid is lower, the hydrogen ions will consume the electrolytes, the hydrogen ions will also be consumed, and the element will begin to corrode faster. Tests: 3 tests were performed for each pH level in the liquids and a total of 9 tests during the experiment. More testing is needed to make sure the data matches the research. It is important to carry out several tests to ensure that the data collected at the end of the experiment are parallel and correlated with each other. Additional tests help the scientist conducting the experiment get more accurate results and see if an accident or error occurred at the beginning of the experiment. This can help them in the near future to correct mistakes and not repeat them next time.!