Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Practical Experiences with Corrosion Protection of Water Intake Gates in Mekong River

  • Phong, Truong Hong (The 276 Mechanical & Construction Co. Vietnam Institute for Tropical Technology & Environmental Protection (VITTEP)) ;
  • Tru, Nguyen Nhi (The 276 Mechanical & Construction Co. Vietnam Institute for Tropical Technology & Environmental Protection (VITTEP)) ;
  • Han, Le Quang (The 276 Mechanical & Construction Co. Vietnam Institute for Tropical Technology & Environmental Protection (VITTEP))
  • Published : 2008.12.01
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Abstract

Corrosion behaviour of water intake gate steel structures with different protective measures was investigated. Five material alternatives were taken for investigation, including: imported and recycled stainless steel, carbon steel with hot zinc spraying, painting and composite coatings. Results of corrosion rate for carbon steel, SUS 304, hot zinc spray coats in three water systems of Mekong river basin (saline, blackish and fresh) were also presented. Corrosion rate of carbon steel decreased with decreasing salinity in the investigated water environments. Meanwhile, these values for zinc coated steel, behaved by another way. Environmental data for these systems were filed and discussed in relation with corrosion characteristics. Method of Life Cycle Assessment (LCA) was applied in materials selection for water intake gate construction. From point of Life Cycle Cost (LCA) the following ranking was obtained: Zinc sprayed steel < Recycled stainless steel < Composite coated steel < Painting steel < SUS 304 From investigated results, hot zinc spray coating has been applied as protective measure for steel structures of water intake systems in Mekong river basin.

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References

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