IS 1817 : 2016

Methods of Test for Coating Thickness on Non-Magnetic Substrates

ASTM D7091 · ISO 2360
CurrentSpecializedTesting MethodMaterials Science · Testing Methods and Quality Control
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Summary

IS 1817 covers eddy current method for measuring coating thickness on non-magnetic substrates — the complement to IS 6746 (magnetic method for steel). Used for measuring anodizing thickness on aluminium, paint on stainless steel, and coatings on non-ferrous metals.

Methods for measuring coating thickness on non-magnetic substrates (aluminium, stainless steel, plastic) using eddy current method.

Key Values
Applicable substratesAluminium, stainless steel, copper, plastic
Accuracy±5% or ±1µm
Practical Notes
! Use IS 1817 (eddy current) for non-magnetic substrates. Use IS 6746 (magnetic) for steel/iron substrates.
! Most modern DFT gauges have both magnetic and eddy current modes — auto-detects substrate type.
! Calibrate on bare substrate of same material — different metals give different readings.
Cross-Referenced Codes
IS 6746:2003Method for Measurement of Coating Thickness b...
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IS 2633:2002Methods for Testing Electroplated Coatings
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IS 1868:1997Anodic coatings on aluminium and its alloys -...
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eddy currentcoating thicknessnon-magnetic substratealuminium coatinganodizing thickness