The corrosion properties of phosphate coating on AZ31 magnesium alloy: The effect of sodium dodecyl sulfate (SDS) as an eco-friendly accelerating agent

► SDS is used as an accelerating agent instead of sodium nitrite in phosphating bath. ► Using SDS, the corrosion resistance of phosphate coating was considerably increased. ► Using SDS, the rate of phosphate coating precipitation on Mg alloy was increased. ► Using SDS, phosphate coating with denser structure was produced.