Chemical Forums

Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: K.O.B.タイタン on February 27, 2021, 02:02:32 PM

Title: Steel dying
Post by: K.O.B.タイタン on February 27, 2021, 02:02:32 PM




Does anyone know if Co3(PO4)2 is soluble in iron?
Title: Re: Steel dying
Post by: Enthalpy on March 03, 2021, 06:30:38 AM
Welcome!

To my surprise, cobalt phosphate can be melted around 1100°C without decomposing.

Intuition, and nothing more, suggests that Co would dissolve separately in liquid Fe, O would react with Fe, and P dissolve in Fe before slowly evaporating.

An other worry is that a solid can lose or change its colour by dissolving.

But you might try to sinter a thin powder mix of cobalt phosphate and steel. This can happen well below 1100°C.

If you get nice colours, please show us!  :D