NZQA registered unit standard
17524 version 4
Page 1 of 3
Title
Demonstrate knowledge of wet abrasive blasting
Level
3
Credits
4
Purpose
People credited with this unit standard are able to demonstrate
knowledge of: wet abrasive blasting equipment and methods;
key principles of wet abrasive blasting; and rust inhibitors in
relation to wet abrasive blasting.
Classification
Industrial Coatings > Abrasive Blasting
Available grade
Achieved
Explanatory notes
1
Documents relevant to this unit standard include Safety Data Sheets for rust
inhibitors.
2
Recommended website:
NZ Abrasive Blasting Association Inc. – http://www.nzaba.co.nz/.
3
Sodium bicarbonate blasting is also known as soda blasting.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of wet abrasive blasting equipment and methods.
Evidence requirements
1.1
Abrasive blasting with water is described in terms of the blasting method,
relevant equipment, and their effectiveness.
Range
methods – water curtain, air-water abrasive, abrasive venturi.
1.2
Selective wet abrasive blasting is described with and without abrasive injection.
1.3
Air-water-abrasive method is described in terms of abrasive venturi injection
system, pressures, adjustments, nozzle, and effectiveness.
1.4
Sodium bicarbonate blasting is described in terms of its effectiveness and
limitations.
NZ Motor Industry Training Organisation
(Incorporated) (MITO)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
17524 version 4
Page 2 of 3
Outcome 2
Demonstrate knowledge of key principles of wet abrasive blasting.
Evidence requirements
2.1
Wet abrasive blasting is described in terms of water nozzle thrust and safety
hazards of higher pressure systems.
2.2
Wet abrasive blasting is described in terms of controlling dust emission.
2.3
Methods of wet abrasive blasting are described in terms of their function.
Range
2.4
abrasive-with-water, water-with-abrasive-injection.
Methods of blasting with sodium bicarbonate are compared with conventional
methods in terms of their effectiveness and the limitations of sodium
bicarbonate.
Outcome 3
Demonstrate knowledge of rust inhibitors in relation to wet abrasive blasting.
Range
may include but is not limited to – acid, phosphate, nitrate;
evidence is required for three types.
Evidence requirements
3.1
Rust inhibitors are described in terms of their types.
3.2
Mixing ratios of rust inhibitors are described in accordance with product data
sheet.
3.3
Safety precautions for rust inhibitors are described in accordance with their
Safety Data Sheets.
3.4
Coating compatibility of rust inhibitors is described in accordance with paint
manufacturer’s recommendations.
Planned review date
31 December 2019
NZ Motor Industry Training Organisation
(Incorporated) (MITO)
SSB Code 101542
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
17524 version 4
Page 3 of 3
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
28 August 2000
31 December 2012
Review
2
20 November 2006
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 2016