1. NBR 15376: Chromium coated steel sheet – Metallic chromium determination by coulometric technique – Method of test n.5;ABNT. Brazilian Association of Technical Standards,2006
2. NBR 15660-1 Steel sheets – Organic coating adhesion – Part 1 – Organic coating tape test method;ABNT. Brazilian Association of Technical Standards,2008
3. NBR 8750: Electrolytic chromium / chromium oxide coated steel – Determination of chromium in the oxide form by colorimetric method;ABNT. Brazilian Association of Technical Standards,2009
4. NBR 7407: Steel sheet – Superficial Rockwell hardness;ABNT. Brazilian Association of Technical Standards,2009
5. NBR 6665: Cold reduced steel mill products – Eletrolytic tinplate and electrolytic chromium / chromium oxide coated sheets or uncoated sheets – Specification n.22;ABNT. Brazilian Association of Technical Standards,2014