![Conquering Corrosion](https://cole-mswmag.imgix.net/https%3A%2F%2Fwww.mswmag.com%2Fuploads%2Fimages%2Fgwinnett_county_2.jpg?crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=620&ixlib=php-1.1.0&q=75&w=1024&s=ecafe109ec172f9b0d05132f159334ee)
A service call to unblock an 8-inch gravity main fed by a 6-inch force main packed a surprise for the Gwinnett County (Ga.) Public Utilities crew. When they popped the cover on the dump manhole, they found the four-year-old epoxy-coated concrete structure disintegrating.
The...