A Preface
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The procedures used to develop this document as well as those used for further maintenance are described in Part 1 of the ISO/IEC Directive. In particular, attention should be paid to the different approval criteria required for different types of ISO documents. This document is according to ISO/IEC directives part 2 edit rules drafted (see iso.org/directives).

ISO 2360-2017 “Non-conductive coatings on non-magnetic conductive substrates – Measurement of coating thickness – Amplitude sensitive eddy current method”

Please note that certain contents of this document may be subject to patent rights. ISO is not responsible for identifying any or all such patent rights. In the process of document development determine the detailed information of any patent rights in the introduction and/or received ISO list of any patent disclosures (see iso.org/patents).

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This document was prepared by Technical Committee ISO/TC 107, Metallic and other Inorganic Coatings.

The fourth edition cancels and replaces the technically revised third edition (ISO 2360:2003).

ISO 2360-2017 “Non-conductive coatings on non-magnetic conductive substrates – Measurement of coating thickness – Amplitude sensitive eddy current method”

1 Scope
This document specifies a sensitive eddy current instrument using amplitude of nonmagnetic conductive non conductive coating thickness on the base metal nondestructive measurement method.

In this document, the term “coating” is used for materials such as paints and varnishing, electroplating coatings, enamel coatings, plastic coatings, overlays and powder coatings. The method is particularly suitable for thickness measurements of most oxide coatings produced by anodic oxidation, but not for all transformed coatings, some of which are too thin to be measured by this method (see article 6).

The method also can be used to measure the conductive nonmagnetic metal coating on the substrate. However, the phase-sensitive eddy current method specified in ISO 21968 is particularly suitable for this application and can provide higher accuracy thickness results (see Annex A).

The method is not suitable for measuring non-magnetic metal coatings on conductive base metals. In accordance with the ISO 21968 phase-sensitive eddy current method is particularly useful for this application. However, in the special case of very thin coatings with very small electrical conductivity, the amplitude sensitive eddy current method can also be used for this application (see Appendix A).

Although this method can be used to measure coating thickness on magnetic base metals, it is not recommended for this application. In this case, the magnetic method specified in ISO 2178 can be used. Only about 1 mm above the very thick coating, the amplitude of sensitive eddy current method can also be used for this application (see appendix A).

ISO 2360-2017 “Non-conductive coatings on non-magnetic conductive substrates – Measurement of coating thickness – Amplitude sensitive eddy current method”

2 Normative references
The following documents are referenced in the text in such a way that some or all of their contents constitute the requirements of this document. For dated references, only the cited version applies. For undated references, the new version of the reference (including any revisions) applies.

ISO 2064, Metallic and other inorganic coatings – Definitions and practices relating to thickness measurement

ISO 4618, paints and varnishes – terms and definitions

ISO/IEC Guide 98-3, Uncertainty in measurement – Part 3: Guide for the representation of uncertainty in measurement (GUM: 1995)

ISO 2360-2017 “Non-conductive coatings on non-magnetic conductive substrates – Measurement of coating thickness – Amplitude sensitive eddy current method”

3 Terms and definitions
For the purpose of this document, given in the ISO 2064 and ISO 4618 is applicable terms and definitions as well as the following.

ISO and IEC maintain for standardized terminology database at the following address:

– IEC electronic encyclopedia: available in electropedia.org/

– ISO online browsing platform: available at iso.org/obp

3.1 the adjustment of the measuring system

A set of operations performed on a measuring system so that it provides a prescribed indication corresponding to a given value of the quantity to be measured

Note 1: the adjustment of the measuring system can include a zero point adjustment, migration and range adjustment (sometimes called gain adjustment).

Note 2: Adjustment of a measurement system should not be confused with calibration, which is a prerequisite for adjustment.

Note 3: after adjustment measurement system, usually need to recalibrate measurement system.

Note 4: in popular culture, the term “calibration” is often mistakenly used, rather than the term “adjust”. Similarly, the terms “verification” and “inspection” are often used in place of the correct term “calibration”.

[source: ISO/IEC guide 99, 2007, 3.11 (also known as “VIM”)]

3.2 Calibration

Under the specified conditions, the first step in the measurement uncertainty in measurement standards provide the number of values and the related measurement uncertainty of the corresponding relationships between instructions operation, and in the second step USES this information, so that measurement results from instructions

ISO 2360-2017 “Non-conductive coatings on non-magnetic conductive substrates – Measurement of coating thickness – Amplitude sensitive eddy current method”

Note 1: Calibration can be expressed in terms of sentences, calibration functions, calibration graphs, calibration curves or calibration tables. In some cases, it may include an additive or multiplicative correction for an indication with associated measurement uncertainty.

Note 2: Calibration should not be confused with the adjustment of the measurement system (often erroneously referred to as “self-calibration”), nor with calibration verification.

Remark 3: Typically, the first step in the above definition is itself considered calibration.

[Source: ISO/IEC Guide 99:2007, 2.39 (also known as “VIM”)]

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