Corrosive Environment Green Chemistry Steps Up to Control Corrosion from Deicers
BY JASON KEILY Guest Writer
Departments of transportation, truckers
and the driving public are familiar with many of the challenges that come with driving during long, cold and snowy winters. Increasingly, another consideration has been added to the list – balancing the need for safe roads with the corrosion damage from chloride-containing deicers to vehicles, snowfighting equipment and road infrastructure. Reducing the corrosive impact of chlorides
has become a higher priority throughout the United States, especially as more localities are opting to use liquid deicers as part of their winter road strategies. While liquid calcium chloride and magnesium chloride paved the way, salt brines are increasingly popular owing to their low cost, high effectiveness in typical winter temperatures (15-32°F), ease of application and efficient, on-site production. Blends of sodium chloride “salt brine” with calcium chloride or magnesium chloride are gaining popularity as they extend this working temperature range and increase melting power. Applying salt brine and blends reduces
salt consumption significantly by spreading the chlorides across the road surface and eliminating the wasteful “bounce and scatter” of rock salt. Perhaps the most efficient and common use of liquids is when they are applied before a storm to form a protective layer that can disrupt the formation of ice pack. When a road department uses such “anti-icing” or
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A metal test coupon immersed in salt brine shows substantially more corrosion (top) than a sample immersed in salt brine mixed with Rivertop’s Headwaters® corrosion inhibitor (bottom).
NEBRASKA TRUCKER — ISSUE 1, 2016 —
www.nebtrucking.com
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