In addition to my commments above , please look at this reference. http://www.fwr.org/copper.pdf. Under deposit corrosion of iron and manganese is also a possibility.
Published by Nikhilesh Mukherjee, Independent - Consultant
In addition to my commments above , please look at this reference. http://www.fwr.org/copper.pdf. Under deposit corrosion of iron and manganese is also a possibility.