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51313-02795-Limiting Corrosion Problems Related to Dust Control Agents

Product Number: 51313-02795-SG
ISBN: 02795 2013 CP
Author: Robert Moser
Publication Date: 2013
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$20.00
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Dust control on unpaved roads and landing zones is frequently necessary to insure the safety of operating personnel and protect critical vehicle systems.  A wide variety of materials have typically been available to prevent the production of dust from unpaved surfaces.  Dust control agents mixed with fine soil can end up remaining on metal surfaces on and under vehicles and aircraft and in some cases can greatly accelerate corrosion.   Hygroscopic salts (humectants) such as magnesium chloride and calcium chloride can be especially corrosive materials because of the high chloride content and the ability of these compounds to keep any surface they contact moist.   Hygroscopic organic compounds such as lactobionic acid (LBA) oxidized sugar can be far less corrosive and the addition of derivative compounds such as potassium lactobionate (K-BA) can further reduce corrosion.  Coupon tests using mild steel placed in contact with soil mixed with 10% LBA solution produced a corrosion rate that was approximately 80% the rate produced by control mixtures of soil and distilled water.  Test with K-BA solutions showed the compound was an effective retardant and could reduce the rate of corrosion to approximately 25% of the corrosion rate of the water-soil control reducing corrosion rates below that seen with LBA alone.  Research indicates that effective dust control can be produced with far less corrosion if organic humectants are used. 

Dust control on unpaved roads and landing zones is frequently necessary to insure the safety of operating personnel and protect critical vehicle systems.  A wide variety of materials have typically been available to prevent the production of dust from unpaved surfaces.  Dust control agents mixed with fine soil can end up remaining on metal surfaces on and under vehicles and aircraft and in some cases can greatly accelerate corrosion.   Hygroscopic salts (humectants) such as magnesium chloride and calcium chloride can be especially corrosive materials because of the high chloride content and the ability of these compounds to keep any surface they contact moist.   Hygroscopic organic compounds such as lactobionic acid (LBA) oxidized sugar can be far less corrosive and the addition of derivative compounds such as potassium lactobionate (K-BA) can further reduce corrosion.  Coupon tests using mild steel placed in contact with soil mixed with 10% LBA solution produced a corrosion rate that was approximately 80% the rate produced by control mixtures of soil and distilled water.  Test with K-BA solutions showed the compound was an effective retardant and could reduce the rate of corrosion to approximately 25% of the corrosion rate of the water-soil control reducing corrosion rates below that seen with LBA alone.  Research indicates that effective dust control can be produced with far less corrosion if organic humectants are used. 

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