Open AccessMarine corrosion behavior of EH 36 steel in the Black Sea
Author(s) -
Laurențiu Mardare,
Lidia Benea
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/572/1/012007
Subject(s) - corrosion , materials science , metallurgy , seawater , carbon steel , primer (cosmetics) , black sea , polarization (electrochemistry) , geology , oceanography , chemistry , organic chemistry
The marine environment is a very aggressive environment for metallic materials, especially for unprotected carbon steel. The steel have a low corrosion resistance in harsh corrosive environment like seawater. However, the most equipments and marine structures are made from carbon steel. The Black Sea is brackish water with low salinity. Due to higher-strength and added excellent toughness and formability, The High Strength Low Alloy (HSLA) steel EH36 is used in shipbuilding and other marine structures. This paper present a comparative investigation regarding the corrosion resistance of: i) uncoated EH36 naval steel, ii) coated EH36 naval steel with a two-component polymeric primer and iii) EH 36 naval steel coated with two-component polymeric primer modified by adding of TiO2 nanoparticles. All three surfaces of steel have been investigated in seawater collected from the Black Sea. In situ electrochemical measurements as: open circuit potential (OCP), polarization resistance (Rp), potentiodynamic polarization (PD) and cyclic voltammetry polarization (CV) were performed to monitor the corrosion process. The results show the improved corrosion resistance of polymeric coatings in marine environment compared with uncoated naval steel.