Studies Concerning the Corrosion Behaviour of the Cast Stainless Steel Used for Chemical Industry

Abstract:

The current work deals with experimental tests concerning the behaviour of different materials used in chemical industry when are exposed to diverse corrosions environments. During the research work four different metals have been tested, namely T₁₅NiCr₁₈₀, T₁₅MoNiCr₁₈₀, W4027 and W4059. The presented work is trying to classify the tested materials function to different chemical environment, different concentration of the environment, different temperature of the environment, and different expose time. Some of the substances which were considered as corrosion environment are: HNO₃, H₃PO₄, NaCl, NH₄Cl, C₂H₅OH, Petrol, NH₄NO₃, KNO₃, K₂CO₃, Na₂CO₃, KMnO₄, KOH and Ca (OH)₂. The concentration of the corrosion solutions varies between 1% and 96%. Tests have been done at room temperature and hot environment of 100°C. Time is playing an important role on evolution of the corrosion. For this reason the samples have been analyzed after 48, 336, 720 and 2160 hours of exposes to chemical agents. To understand the comportment of the subject metals when are used in industry, samples have been tested for longer period of time, respectively 1, 3, 6 and 12 months. After each selected period of time the metallic samples were analyzed and measured to quantify the effect of the environment on the corrosion speed.

• Periodical: Applied Mechanics and Materials (Volume 371)
• Pages: 338-342
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.371.338
• Online since: August 2013
• Authors: Gheorghe Simionescu, Mirela Gheorghian
• Keywords: Adsorption, Annealing, Corrosion Speed, Crystal Structure, Intergranular Corrosion (IGC), Stainless Steel (SS), Welding

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