Investigation of Mechanical Properties and Corrosion Behaviour for 1010 Carbon Steel Pipes Used for Steam Boilers

Abstract

Depending on the conditions of their use, most equipment gets deteriorated in time. In this paper the corrosion rate (CR) was verified by using the experiment of weight loss (WL) of specimens from steam boiler pipes (SBP) made of 1010 carbon steel with a thickness of 4 mm. CR was calculated by specimens’ weight loss in the corrosive environment at 25 °C in 5% NaCl - 10% H2O2 solution which reproduces the environment in the plant during specific times. The mechanical properties which were verified include hardness test and tensile test. The results that have been obtained through tensile curves and hardness properties on specimens 1 and 2 were compared to a non-service specimen (3) made of 1010 carbon steel. It is concluded that there was an increase in the properties of tensile and a decrease of hardness for both specimens by comparing them with a non-service specimen. Due to overheating, a deposition of layers of lime (CaO) on the pipes was caused. It is noticed that the decrease of the mechanical properties leads to increased corrosion.

Keywords

• steam boilers pipes
• carbon steel
• corrosion rate
• weight loss
• hardness properties
• tensile stress