Na₂SnO₃ functions as outstanding magnesium alloy passivator by synergistic effect with trace carboxymethyl chitosan for Mg–air batteries for standby protection

Abstract

Different concentrations of sodium stannate (Na2SnO3) (0.2, 0.5, 2.0 and 5.0 mM), as well as their mixture with trace amount of carboxymethyl chitosan (CMCS) (0.1 mM) are selected as electrolyte additive for AZ61 alloy in 3.5 wt.%...

Corrosion Protection Behavior of Aluminate Ion-Loaded Layered Double Hydroxide Coating on AZ31 Magnesium Alloy

“…As a corrosion inhibitor for Mg alloys, Na 2 MoO 4 Na 2 SnO 3 and NaVO 3 have been proposed. [16][17][18][19][20][21] In addition to these, we expect NaAlO 2 and KAlO 2 to act as a corrosion inhibitor because the oxide film containing more than 4% Al shows high corrosion resistance for AZ series Mg alloys [22][23][24] and KAlO 2 in the electrolyte deposits to form MgAl 2 O 4 in the anodic oxide film of Mg alloy. 25 To form the corrosion inhibitor-loaded LDH coatings, generally, LDH coatings with NO 3 − or CO 3 − ions in the interlayer (LDHNO 3 or LDHCO 3 ) are formed on the alloys by steam treatment, autoclaving, chemical conversion and electrochemical deposition, and then the interlayer NO 3 − or CO 3 − ions are exchanged with anionic inhibitors in aqueous solutions.…”