Corrosion behavior of two low alloy steel in simulative deep-sea environment coupling to titanium alloy

Publication date: March 2019Source: Colloid and Interface Science Communications, Volume 29Author(s): Weijie Fan, Yong Zhang, Huiwen Tian, Wei Wang, Weihua LiAbstractCorrosion behavior of two different low alloy steels (specimen 1, specimen 2) coupling to titanium (Ti) alloy was studied in simulative deep-sea environment with 500 m depths. Immersion tests revealed that the corrosion rate of specimen 1 was higher than that of specimen 2. The micro morphology showed all specimens of specimen 1 steel was susceptible to both intergranular and pitting corrosion. Electrochemical results imply that the galvanic current of specimen 1 was bigger than specimen 2, then decreased and stabilized at a small range after 15 h correspond. Finite element method was constructed to explain the development of the galvanic current density distribution with distance to the electrodes. The corrosion resistance of the alloy steels followed the order: specimen 2 > specimen 1 when coupling to Ti alloy.Graphical abstract
Source: Colloids and Interface Science Communications - Category: Nanotechnology Source Type: research