Northern California failure analysis expert often performs plumbing failure analysis. In this case, the corrosion expert examines plumbing in numerous houses that were plugged due to brass dezincification of yellow brass. In this case, the zinc in the copper-zinc alloy corrodes selectively and this leaves a white deposit on the interior of the pipe. The white material is a combination of zinc oxide and zinc carbonate. Above is an example of significant dezincification; however, this pipe is still fairly open. One can see that the flow of the water is from the brass to the copper and the corrosion product is being dragged into the copper pipe from the corroding brass fitting that is soldered to it. As the brass continues to corrode, the fitting can become clogged and its strength will significantly decline.