NZQA registered unit standard
Title
17542 version 4
Page 1 of 3
Demonstrate knowledge of film thickness measurement and porosity detection, and test protective coatings
Level
Purpose
4 Credits 8
People credited with this unit standard are able to: demonstrate knowledge of film thickness measurement for protective coatings; demonstrate knowledge of film porosity detection; and test protective coatings.
Classification Industrial Coatings > Protective Coatings
Available grade Achieved
Explanatory notes
1 Documents relevant to this unit standard all available at http://infostore.saiglobal.com/store/ include:
AS 3894.3: 2002: Site testing of protective coatings
– determination of dry film thickness;
AS 3894.4: 2002 Site testing of protective coatings – Assessment of degree of cure ;
AS 3894.9: 2003 Site testing of protective coatings
– Determination of adhesion.
2 Recommended website:
NZ Abrasive Blasting Association Inc. – http://www.nzaba.co.nz/ .
Outcome 1
Demonstrate knowledge of film thickness measurement for protective coatings.
Evidence requirements
1.1 Film thickness measurement is described in terms of method for wet film readings.
1.2 Film thickness measurement is described in terms of method for dry film readings.
1.3 The formula for calculating required dry film thickness before thinning is described in accordance with AS 3894.3.
1.4 The formula for calculating wet-to-dry film thickness after thinning is described in accordance with AS 3894.3.
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New Zealand Qualifications Authority 2020 NZ Motor Industry Training Organisation
(Incorporated) (MITO)
SSB Code 101542

NZQA registered unit standard
1.5
17542 version 4
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A wet film thickness gauge is identified and its use is explained in accordance with manufacturer’s instructions.
1.6 Permanent magnet instruments are identified and their use on steel substrates is explained in accordance with AS 3894.3.
1.7 An electronic gauge is identified and its use is explained in accordance with
AS 3894.3.
1.8 Other instruments for measuring dry film thickness are identified and their methods are described in accordance with manufacturer’s instructions.
Range two instruments.
1.9 Calibration of a permanent magnet instrument is described in accordance with
AS 3894.3.
1.10 Calibration of an electronic gauge is described in accordance with manufacturer’s instructions.
1.11 Multiple readings of film thickness are described in accordance with AS 3894.3.
Outcome 2
Demonstrate knowledge of film porosity detection.
Range low-voltage sponge method, high-voltage spark method.
Evidence requirements
2.1 Porosity testing is explained in terms of methods and their suitability for different applications.
2.2 Calibration of porosity detection equipment is described in accordance with manufacturer’s instructions.
Outcome 3
Test protective coatings.
Evidence requirements
3.1
3.2
A wet protective coating is tested for adhesion in accordance with AS 3894.9.
A wet protective coating is tested for curing and hardness in accordance with
AS 3894.4.
3.3 An inorganic zinc coating is tested for curing in accordance with AS 3894.4.

New Zealand Qualifications Authority 2020 NZ Motor Industry Training Organisation
(Incorporated) (MITO)
SSB Code 101542

NZQA registered unit standard 17542 version 4
Page 3 of 3
Planned review date 31 December 2019
Status information and last date for assessment for superseded versions
Process Version Date Last Date for Assessment
Registration
Review
1
2
28 August 2000
20 November 2006
31 December 2012
31 December 2013
Review 3 18 October 2012 31 December 2016
Review 4 16 April 2015 N/A
Consent and Moderation Requirements (CMR) reference 0114
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the NZ Motor Industry Training Organisation (Incorporated) (MITO) info@mito.org.nz if you wish to suggest changes to the content of this unit standard.
NZ Motor Industry Training Organisation
(Incorporated) (MITO)
SSB Code 101542

New Zealand Qualifications Authority 2020