corrosion

“We have to explore new materials and more corrosion resistant alloys,” says Sigrun Nanna Karlsdottir, a professor of industrial and mechanical engineering at the University of Iceland.

Environmental groups contend that federally mandated corrosion protection was not effective on the 30-year-old pipeline, and say it will never perform safely.

"Analysis of the domestic hot water pipework has indicated erosion corrosion and galvanic corrosion to be the cause, pseudomonas is not a factor."

If more than 10% of tap water samples exceed 15 parts per billion, the water system must take action, including implementing more corrosion controls or replacing pipelines.

The culvert — installed when the 101 Freeway was built in the 1950s — failed because of corrosion, Moreno said in an email.