A study on corrosion behavior of austenitic stainless steel in liquid metals at high temperature

Interfacial Phenomena between Liquid Ga-Based Alloys and Ni Substrate

“…The estimated diffusion coefficients of Ni in liquid gallium at 500°C assume 24.86 (10 À5 cm 2 s À1 ) compared to in liquid Sn and Zn, which is 11.38 and 3.32 (10 À5 cm 2 s À1 ), respectively. 13 For the experiment performed at 500°C, it was found that all the diffusivities of metallic species are higher in liquid gallium than in liquid tin and/or zinc when dissolved metallic species diffuse out into the liquid bath. 13 Therefore, it is generally expected that the diffusivities of metallic species are higher in liquid gallium than in liquid gallium alloys, resulting in greater metal loss and a greater reaction layer thickness in liquid gallium 4.…”

“…5). Diffusion in the solid is the slowest process among the three steps of the liquid metal corrosion, which can result in a selective IMC corrosion layer 19 In, 13 the model fitting of the weight loss of nickel in pure gallium, Ga-14Sn-6Zn and Ga-8Sn-6Zn alloys, shows the greatest weight loss compared to Ga-8Sn-6Zn. After 500 h, the weight loss, D wNi , is 0.00363 (g.cm À2 ) in pure gallium, 0.00125 (g.cm À2 ) in Ga-14Sn-6Zn and 0.0024 (g.cm À2 ) in Ga-8Sn-6Zn, respectively.…”

“…26,27 than in liquid gallium alloys. 13 The growth rate for interface migration is described by an Arrheniustype equation:…”

“…12 Moreover, the very high bonding temperature of Ga alloys creates the possibility of application in nuclear reactors as a coolant. 13 The liquid metal most commonly used as a primary coolant in nuclear reactors is sodium, but this has the disadvantage of reacting violently with water and air. 14 With a view to avoiding these dangers, alternative coolant systems such as heavy liquid metals (including pure lead and lead-bismuth eutectic (LBE) alloy) have been extensively studied for their potential application in fast reactors and as spallation targets.…”

“…16 The even application of austenitic stainless steel (AISI 316L) at higher temperature caused the formation of a reaction layer and suggested that improved corrosion resistance with a protective layer such as Al 2 O 3 and SiO 2 must be pursued. 13 The most promising potential application of liquid gallium alloys is in electronic devices. However, liquid Ga alloys react and dissolve the Cu substrate.…”