Elements and Performance Criteria

RANGE STATEMENT
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Codes of practice/standards
Where reference is made to industry codes of practice, and/or Australian/international standards, it is expected the latest version will be used.
Surface preparation methods include
descaling
mechanical finishing
solvent cleaning
alkaline cleaning
measurement of surface cleanliness
Theory of electroplating includes:
electrical circuits
current density, limiting of current density
Faraday's laws
electrolytic conductivity
polarisation
standard electrope potential
co-deposition of hydrogen
codeposition of metals
throwing power
levelling and brightening
distribution of deposits
anodes
the hull cell as the major quality control in electroplating
current density
ph
evaluation of electroplating
testing of thickness of deposit and adhesion
to understand the various methods of thickness and adhesive tests and their effectiveness.
evaluation of the characteristics of copper nickel and chromium plating
operational contrast
solution concentration
bath analysis
temperature
conditions for bright plating
effect of impurities
anodising aluminium
the principles of anodising, colouring, sealing, and testing of anodised coatings.
methods of applying zinc
hot dip galvanising
continuous electrolytic tin plating
evaluation of continuous plating
comparison of zinc coating methods
metal spraying
sheradizing
zinc rich paints
practices in particular the halogen tin plating bath
vitreous enamelling
Surface treatment requirement
Surface treatment requirements may be for:
engineering
corrosion resistance
conductivity
aesthetics
other reasons
Surface treatment requirements may be determined alone by a metallurgist or in conjunction with other experts and clients.
Appropriate tests
Tests which can be undertaken by a technician within the organisation as well as those required to be undertaken by external organisations, including simple tests.
Appropriate persons
Internal technicians and/or external organisations

EVIDENCE GUIDE
The Evidence Guide provides advice on assessment and must be read in conjunction with the Performance Criteria, Required Skills and Knowledge, the Range Statement and the Assessment Guidelines for the Training Package.

Overview of assessment
A person who demonstrates competency in this unit must be able to select surface treatment methods for metallic components or products. Critical aspects for assessment and evidence are required to demonstrate competency in this unit.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
It is essential that competence is demonstrated in the ability to:
identify properties of surface to be treated or protected
select appropriate surface treatment process for surface and protection need
specify and evaluate tests of surface treated metals and alloys
Relationship to other units

This unit may be assessed concurrently with other relevant units.
Assessment method and context
Assessors must be satisfied that the person can consistently perform the unit as a whole, as defined by the elements, performance criteria, skills and knowledge. A holistic approach should be taken to the assessment.
Assessors should gather sufficient, fair, valid, reliable, authentic and current evidence from a range of sources. Sources of evidence may include direct observation, reports from supervisors, peers and colleagues, project work, samples, organisation records and questioning. Assessment should not require language, literacy or numeracy skills beyond those required for the unit.
The assessee will have access to all techniques, procedures, information, resources and aids which would normally be available in the workplace. The method of assessment should be discussed and agreed with the assessee prior to the commencement of assessment.
Resource implications
This section should be read in conjunction with the range of variables for this unit of competency. Resources required include suitable access to an operating plant or equipment that allows for appropriate and realistic simulation. A bank of case studies/scenarios and questions will also be required to the extent that they form part of the assessment method. Questioning may take place either in the workplace, or in an adjacent, quiet facility such as an office or lunchroom. No other special resources are required.