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Research Paper | Civil and Environmental Engineering | Sri Lanka | Volume 12 Issue 2, February 2023

Study on Effectiveness of Corrosion Preventing Materials for Exposed Steel in Construction Projects

H. A. S. Madhuwanthi | T. D. Denagama

Abstract: Corrosion is a natural process that converts cast metal into chemically stable oxide, hydroxide, or sulfide. It chemically and electrochemically reacts with the environment. In the presence of moist air, the iron Fe2+ or Fe3+ process oxidizes to corrode, becoming Fe (OH) 2. Further, react moist with air it becomes Fe2O3.H2O is called brown rust. That is called corrosion. The strength of steel is decreased due to this process. The corrosion of steel is a major problem for construction projects. The corrosion of steel leads to the crack of concrete elements, reducing the bond energy and cross-section of steel. To prevent this, it is important to follow proper precautions. So far there are a very limited amount of research has been done on the effectiveness of these chemicals. Hence this research has identified the effectiveness of several chemicals currently used in construction projects. This research mainly focuses to identify the most effective material for applying exposed steel on concrete elements in projects in different locations. Ferrorep, ZRC, Q/D metal primer Zinc phosphate, SAFE CORE R were selected, which is the most commonly used corrosion-preventing materials on the sites. Selected four materials were applied on steel pieces and kept in different 4 locations, Sooriyawewa, Bandarawela, Galle, and Matara (Coastal Area). Image Comparative method was used in analyzing the collected data which were taken every week at the above-mentioned locations. Image J software was used to analyze the obtained image. As per the analysis, ZRC and Q/D metal primer zinc phosphate can be applied to protect the steel from exposure to the environment in any area. Further SAFE CORE can be used for shorter period protection. Q/D metal primer zinc phosphate can be recommended in any type of environmental conditions and its cost is also lower than the other three selected materials.

Keywords: Corrosion, Construction project, Effectiveness, Reinforcement, Steel

Edition: Volume 12 Issue 2, February 2023,

Pages: 40 - 44

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