What indicates the presence of corrosion during the water break test?

The presence of corrosion during the water break test is indicated by water beading on the surface. When a clean, uncorroded surface is present, water spreads out evenly and forms a thin film. However, if there is corrosion, impurities or roughened surfaces will not allow the water to spread out; instead, it will bead up in certain areas. This phenomenon occurs because corrosion creates discontinuities or surface conditions that disrupt the cohesive properties of the water, preventing it from forming a continuous film. Observing water beading is a clear visual cue that corrosion is present, signaling the need for further inspection or remediation of the affected area.