Finishing Surfaces by Applying Treatments A/508/5116

Transcription

1 Unit Title Ofqual unit reference number (code) Organisation Reference Finishing Surfaces by Applying Treatments A/508/5116 QU Unit Level Level 2 Unit Sub Level None GLH 41 Unit Credit Value 9 Sector Subject Areas 4.1 Engineering Unit Grading Structure Pass Availability Restricted Organisations Assessment Guidance Restricted N/A This unit must be assessed in a work environment and must be assessed in accordance with the Common Requirements for National Vocational Qualifications (NVQ) in the QCF which can be downloaded from Semta s website or requested via customerservices@semta.org.uk Additional assessment requirements have been published by Semta. These additional assessment requirements are set down in Semta s PEO NVQ QCF unit assessment strategy which can be downloaded from Semta s website or requested via customerservices@semta.org.uk LEARNING OUTCOMES ASSESSMENT CRITERIA The learner will: The learner can: 1. Finish surfaces by applying treatments Work safely at all times, complying with health and safety legislation, regulations and other relevant guidelines Carry out all of the following during the surface treatment activities: adhere to procedures or systems in place for risk assessment, COSHH, personal protective equipment (PPE) and other relevant safety regulations

2 follow job instructions and surface treatment specifications and procedures ensure that the equipment is correctly prepared for the treatment operations being performed carry out handling/jigging of the component (where appropriate) clean all tools and equipment on completion of the surface treatment activities dispose of waste and excess materials, in line with agreed organisational procedures Apply surface treatments to components by carrying out one of the following processes: powder coating hot dip treatments electroplating anodising chemical treatments phosphating Apply surface treatments to two different substrates from the following: mild steel stainless steel brass copper zinc based diecastings aluminium previously plated substrates plastics/composite material glass other materials (specify) Apply surface treatments to two different types of component from the following: irregular components with multiple surfaces welded/joined components hollow/tubular components flat components Plan the surface treatment activities before they start them Prepare the work surfaces in readiness to receive the appropriate treatment Prepare the components for the surface treatment activities, by carrying out three of the following: degreasing cleaning

3 rinsing masking pre-heating pickling Check that the surface treatment equipment and solutions are set up and maintained at satisfactory operating conditions and levels Use one of the following methods for locating the work during the surface treatment process: wiring specialised jigs jigging components, which are masked prior to processing jigs with integral masking Carry out the surface treatment process, using appropriate techniques and procedures Carry out the surface treatment activities, to include carrying out all of the following: start up the surface treatment equipment, using approved procedures confirm with the authorised person that the plant is ready for carrying out the surface treatment operations ensure that the equipment settings and process solutions are set and adjusted to maintain the correct specification (such as time, levels, temperature, current) continued: check that the components are correctly prepared for the required treatment activities (such as dry, at the correct temperature, correctly masked) load components safely into the treatment plant/solutions ensure that components are left for the required induction period (if applicable) remove the components from the plant/solution safely and correctly apply appropriate post treatment activities (such as curing, cooling, quenching) Check that the finished surface achieves the required characteristics and meets the surface treatment specification Carry out checks on the treated surfaces, to include four of the following: freedom from damage

4 freedom from contamination overall coverage/completeness of the coating operations thickness of deposit/coating appearance of deposits (such as colour, brightness) bend test (such as manual or mechanical) surface roughness checks adhesion of deposit to substrate porosity of coating deposit hardness brittleness of deposit abrasion resistance corrosion testing Carry out surface treatment processes which comply with all of the following: the final surface finish is in line with the specification or job requirements the finished surface is free from defects the finished surface meets customer/company requirements Deal promptly and effectively with problems within their control, and seek help and guidance from the relevant people if they have problems that they cannot resolve Shut down the surface treatment equipment to a safe condition on completion of the activities Leave the work area in a safe condition on completion of the surface treatment activities. 2. Know how to finish surfaces by applying treatments Describe the specific health and safety precautions which must be taken when preparing surfaces and applying surface treatment processes (such as wearing protective clothing and protective equipment, using fume extraction equipment) Describe the hazards associated with preparing surfaces and applying surface treatments (such as using chemicals for cleaning and coating activities, fume inhalation, splashes from hot or corrosive treatment processes), and how they can be minimised Describe the personal protective equipment (PPE) to be used; how to obtain it and check that it is in a safe and usable condition (such as eye

5 protection, overalls, face masks, breathing equipment) Describe the requirements for working in confined spaces and safe systems of work (including required air quantities (RAQs) and local exhaust ventilation (LEV)) to maintain safe conditions Describe the importance of ensuring that fume extraction equipment is operating effectively, and that good housekeeping and fire prevention procedures are observed Describe the importance of following job instructions and defined surface treatment procedures Describe the surface preparation methods and techniques to be undertaken prior to applying the treatments (such as stripping off old materials; using solvents to remove dirt and grease; masking surfaces to contain the deposits) Describe the specific surface treatment process to be carried out, and the types of application for which they are best suited (such as powder coating, hot dip treatments, chemical treatments, phosphating, electroplating and anodising) Describe the basic principles of operation of the specific surface treatment process being carried out Describe the pre-treatments to be carried out on the components prior to the surface treatment activities (such as cleaning/degreasing, pickling, pre-heating) Describe the visual checks to be made on the components prior to carrying out the surface treatment activities (such as checking they are dry, have been pre-heated or are correctly masked up) Describe the need to make certain that all substrates and jigs are completely free of water or other solvents prior to immersing in a hot solution, and the potential consequences of failing to check this.

6 2.13. Describe the methods used to hold/secure components during the surface treatment process (such as wires, hooks, jigs) Describe the setting up of the surface treatment plant and equipment, and the operation and locations of emergency shutdown stops Describe the importance of monitoring the equipment settings and process solutions during the treatment process Describe the time intervals that the components need to be immersed, or time required between coats, and why these must be adhered to Explain how to identify surface treatment processing faults (including blistering, missed deposits, dull deposits, contamination and poor adhesion) Explain how to check and assess the finished work (such as for appearance, colour, coating thickness, coverage and adhesion) Describe the problems that can occur with the surface treatment operations, and how these can be overcome Explain when to act on their own initiative and when to seek help and advice from others Describe the importance of leaving the work area and equipment in a safe and clean condition on completion of the surface treatment activities (such as returning tools and equipment to the designated location, cleaning the work area, and removing and disposing of waste) Describe the importance of ensuring that fume extraction equipment is operating effectively, and that good housekeeping and fire prevention procedures are observed. Equivalences N/A NOCN 2016