Experimental Study Of The Effect Of Chlorine In Drinking Water Flow On Astm A53 Black Steel Pipe Walls

Abstract

This study investigates the corrosion rate of black steel pipes (ASTM A53) used in drinking water distribution systems when exposed to chlorinated water over varying immersion times. The research aimed to analyze the impact of chlorine on the corrosion behavior and mechanical properties of black steel pipes. The methodology involved preparing pipe specimens, which were cut, smoothed, and weighed before immersion in a chlorine solution (200 mg in 5 liters of distilled water) with controlled pH levels. The specimens were submerged for 24, 48, 72, 96, 120, and 144 hours, with flow rates maintained at 0.625 L/min. Corrosion rates were assessed based on weight loss measurements before and after exposure. The results showed a progressive decrease in specimen weight from 73.5873 grams to 64.4786 grams as immersion time increased, indicating significant material degradation. The pH of the solution also increased from 6 to 7–8, suggesting chemical reactions during corrosion. These findings highlight the role of chlorine concentration, flow capacity, and pH changes in accelerating corrosion, emphasizing the need for water quality management to enhance the durability of piping systems.