IS 2633 provides test methods for evaluating electroplated coatings — thickness, adhesion, porosity, and corrosion resistance. Referenced by IS 1068 (Ni-Cr plating) and IS 1573 (zinc plating) for acceptance testing.
Methods for testing thickness, adhesion, porosity, and corrosion resistance of electroplated coatings on metallic substrates.
Key Values
Salt spray temp35 ± 2°C
Salt concentration5 ± 1% NaCl
CASS test temp50 ± 2°C
Practical Notes
! Magnetic thickness gauge is the quickest method for non-magnetic coatings (zinc, nickel, chrome) on steel.
! Salt spray test hours should match the specification requirement — 96h for Fe/Zn12, 200h for Fe/Zn25.
! Adhesion test by bend method is the simplest — bend sample 180° over mandrel and check for peeling.
! For referee testing, microscopic cross-section method is the most accurate for thickness.