Migratory corrosion inhibitors

Maintaining Safe Pavements This Winter1Presented byRichard MannersPresidentGarden State Sealing

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Water

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To understand how salts work to melt ice, you need to first understand water and ice.Water is a low viscosity liquid and its molecules are randomly organized and flow freely at room temperature. 3

Freezing Point of Water

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As temperatures lower, water molecules slow down and stick together forming ice. The ice forms at a temperature of 32 F or below.4

Lowering Freezing Point of Water

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To stop the ice from forming, you need to add a dissimilar substance to the water. For example, by adding oil, water will not freeze at its normal freezing temperature. Ice melts are also dissimilar in structure to water and will lower the freezing temperature of water.5

Garden State Sealing6Ice MelterEutectic TempoFOptimal laboratory settingPractical TempoFCalcium Chloride-59-25Magnesium Chloride-27-13Sodium Chloride-618Calcium Magnesium Acetate (CMA)-3.7525

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How does salt work?salt may be applied on a dry pavement, but it does not begin working until moisture is present for the salt to dissolve into a brine.

The brine will not freeze until the air temperature reaches the brines eutectic temperature.7

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When spread on snow or ice, salt makes a brine immediately with the film of surface water on the ice and snow. This lowers the freezing point and starts melting the ice that the brine is in contact with. 10

Ice Melting Chemicals

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Sodium Chloride

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Calcium Chloride

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Magnesium Chloride

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Calcium Magnesium Acetate

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Common AdditivesAlcoholCorn SteepsBeet JuiceSugarsCorrosion Inhibitors (CI5)

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Deicer Effect on Concrete18Garden State Sealing

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De-Icing salts, should NEVER be used in the first year after placing the concrete.

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Freeze Thaw cycle

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Deicer Effect on Steel Reinforcement

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2010: Hackensack, NJ

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2012 Woodbridge, NJ

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2015 Secaucus, NJ

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Corrosion of Reinforcing Steel

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Maintain Safe Pavements While Protecting Concrete

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Film Forming Sealer

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Surface Sealer

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