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Elements and Performance Criteria

1. Identify corrosion controls in use
   • Identify sites susceptible to corrosion on work area
   • Identify the causes and effects of corrosion at these sites
   • Identify the corrosion inhibitors used in work area
   • Determine hazards associated with corrosion and corrosion control
   • Control hazards associated with corrosion and corrosion control
   • Coordinate with appropriate personnel
2. Dose corrosion inhibitor in accordance with procedures
   • Monitor indicators of rate of corrosion
   • Monitor inhibitor dosing equipment
   • Adjust rate of dosing
   • Monitor inhibitor stocks
   • Recognise situations requiring action
   • Take action, as required
3. Test plant for corrosion in accordance with procedures
   • Identify corrosion testing methods used in work area
   • Complete testing activities as required by procedures
   • Examine test results and take action
4. Isolate and de-isolate dosing plant
   • Isolate dosing plant
   • Make safe for required work
   • Check dosing plant is ready to be returned to service
   • De-isolate and prepare dosing plant for return to service

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.
Regulatory framework	The latest version of all legislation, regulations, industry codes of practice and Australian/international standards, or the version specified by the local regulatory authority, must be used, and include one or more of the following: legislative requirements, including work health and safety (WHS) industry codes of practice and guidelines environmental regulations and guidelines Australian and other standards licence and certification requirements All operations to which this unit applies are subject to stringent health, safety and environment (HSE) requirements, which may be imposed through state/territory or federal legislation, and these must not be compromised at any time. Where there is an apparent conflict between performance criteria and HSE requirements, the HSE requirements take precedence.
Procedures	All operations must be performed in accordance with relevant procedures. Procedures are written, verbal, visual, computer-based or in some other form, include one or more of the following: emergency procedures work instructions standard operating procedures (SOPs) safe work method statements (SWMS) formulas/recipes batch sheets temporary instructions any similar instructions provided for the smooth running of the plant
Hazards	Hazards include one or more of the following: noise, rotational/reciprocating equipment or vibration plant services (steam, condensate and cooling water) hazardous products and materials other hazards that might arise
Routine problems	Routine problems are predictable and have known solutions and include one or more of the following: lifting equipment failures fire and explosion burns atmospheric hazards manual handling hazards static electricity
Non-routine problems	Non-routine problems are unexpected problems, or variations of previous problems and must be resolved by applying operational knowledge to develop new solutions, either individually or in collaboration with relevant experts, to: determine problems needing action determine possible fault causes develop solutions to problems which do not have a known solution follow through items initiated until final resolution has occurred report problems outside area of responsibility to designated person Operational knowledge includes one or more of the following: procedures training technical information, such as journals and engineering specifications remembered experience relevant knowledge obtained from appropriate people
Corrosion control system	This unit of competency includes all such items of equipment and unit operations which form part of the corrosion control system, including as appropriate to the facility: dosing pumps flow rate controllers analytical instrumentation related to corrosion head tanks test coupons or similar brushes inspection devices
Work area	Work area refers to the systems or units the technician is responsible for. Depending on the organisation and context it might be a plant area, a well head or pipeline covering thousands of kilometres.
Corrosion inhibitors	Corrosion inhibitors include or more of the following: anodic or cathodic inhibitors film formers oxygen scavengers pH adjusters/buffers biocides additives and carriers, such as: solvent base surfactants dispersants demulsifiers de-foamers
Inhibitor dosing	Inhibitor dosing includes one or both of the following: continuous batch injection

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Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy the requirements of the elements and performance criteria, and include the ability to:

identify corrosion and its causes and effects

monitor rate of corrosion

monitor and adjust rates of inhibitor dosing

undertake corrosion tests and interpret results

isolate and de-isolate equipment

recognise early warning signs of equipment/processes needing attention or with potential problems

identify hazards and risks and apply risk control procedures

communicate effectively with team/workgroup, supervisors and other personnel

complete forms and documentation.

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Knowledge Evidence

Evidence must be provided that demonstrates knowledge of:

the galvanic series

electrochemical corrosion

types of corrosion/causes of anode formation

factors controlling the rate of corrosion

types of corrosion inhibitors used and their action

hazards associated with corrosion inhibitors and relevant hazard controls

costs and hazards of corrosion

principles of operation of dosing equipment

physics and chemistry relevant to the process unit and the materials processed

process parameters and limits (e.g. temperature, pressure, flow and pH)

hierarchy of control

relevant alarms and actions

plant process idiosyncrasies

all items on a schematic of the plant item and the function of each

types and causes of problems within operator's scope of skill level and responsibility.

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