Effect of Animal Slurry on Carbon Structural S235jr Steel at 318 K

Abstract

Carbon steels as a construction materials are still very popular, but exposed to corrosion. Low-carbon steel is often used as a construction material for agricultural equipment. Corrosion is a result of the chemical and electrochemical environment influence on the material. In alloys and metals changes occur as a result of interaction with the surrounding environment. One of the most important factors constructional material is corrosion resistance, first of all in demanding animal environment. Slurry is a mixture of animals dung and urine. The aggressive corrosive constituents in slurry are urea, uric acid, naturally excreted chloride and as well as ammonia or ammonium salts. In practice roughness parameters for every of the research times can be used for determine the size of steel corrosion. Equipment with carbon steel can be easy built by welding quickly at a low price, but biggest problem in aggressive environment is their corrosion protection. The purpose of this article is to investigate corrosion resistance in different time (48, 96, 144, 192, 240, 288, 336, 384 hours) using weight loss and profile roughness parameters of structural steel in grade S235JR in natural animal slurry at 318 K. Corrosion tests show that the tested steel in animal slurry as a corrosive environments is characterized through continuous corrosion process whose measure may be surface roughness.

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