How to analyze free carbon in chromium carbide
 
Zhangjiagang YaoYu Wear Resistant Materials Company solves problems come from refractory chromium carbide using mixed acid high pressure decomposition method, it can be detected in the range 0.050%-1.00% with this system, high accuracy and precision.

1.Put chromium carbide coupons in PTFE crucible
2.Flush out the crucible wall using deionized water
3.Combine hydrofluoric acid and nitric acid in cruble, well - distributed, out them in autoclave and heat up on the graphite oven, according to the selected sample dissolution temperature and time
4.Cooling would be necessary after decomposition
5.Remove and clean chromium carbide test solution and free carbon, filter and dry them out in crucible with acid-washed asbestos
6.Transfer acid-washed asbestos and free carbon to porcelain, dry it in the oven, then test it using carbon analyser, and calculate the results of free carbon.