Brake-line corrosion and rusting on cars from winter salting is often inevitable, but Bangor city officials will treat the roads this winter with a mixture they say is cheaper and less corrosive.

The Finance Committee of the Bangor City Council approved Public Works Director Dana Wardwell’s proposition Monday night to use a magnesium chloride mixture called Magic instead of calcium chloride this winter. The cost difference is $2.25 a gallon to Magic’s $1.25, Wardwell said.

The city has used calcium chloride for the last 20 years, and “it’s a little more corrosive” than the alternative, Wardwell said.

Rock salt is sprinkled on city streets in the snow and ice, but a liquid additive is applied to help the rock salt continue to work when temperatures drop below 20 degrees, Wardwell said.

Corrosion inhibitors are added to the mixture, but they aren’t always effective, Wardwell said.

Six-thousand-gallon tanks of Magic, produced by New York-based Innovative Surface Solutions, will be attached to public works trucks once the shipment of the substance arrives in a few weeks, Wardwell said.

The city typically uses about 15,000 gallons of liquid calcium each winter, and 6,000 tons of rock salt, Wardwell said.

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