Understanding & Testing the Wet & Dry Properties of Coatings

Contents

Introduction to Test Methodology

  • Principles of testing & Correlation
  • Quality Control & Specification
  • Accuracy & Precision
  • Repeatability & Reproducibility

Properties of Liquid Coatings

Rheology

  • Definitions and Units
  • Types of Rheological behaviour
    • Shear thinning, thixotropy, extensional flow etc.
  • Factors influencing Viscosity
  • Measurement Techniques
  • Overview of Instruments
    • Practical Work

Surface Tension & Flow

  • Wetting & Contact Angles
  • Surface & Interfacial Tension
  • Dynamic surface tension
  • Surface tension Gradients
  • Control of spreading and flow
  • Film Defects
    • Bénard Cells, Craters, Floating, Flooding, Orange Peel etc.
  • Measurement of Surface tension
    • Characterisation Tests
    • Practical Work

Properties of Dry Films

  • Mechanical Properties
    • Modulus of Elasticity
    • Tensile Strength
    • Extensibility
    • Impact Strength & Abrasion Resistance
    • Scratch Resistance
  • Adhesion & Adhesive Performance
    • Destructive and non-destructive test methods
  • Resistance testing
    • Durability & Accelerated Weathering
    • Corrosion Resistance Testing
  • Water Permeability
  • Appearance Tests
    • Gloss & Sheen
  • Opacity
    • Contrast Rations, Scatter Coefficients and tint methods

Standards

  • Purpose of Standards
  • Sources of Standards
    • National Standards e.g. BSI
    • European Standards EN
    • International Standards ISO
  • Standard Tests available at PRA

Practical Work

Time will be set aside through out the day to enable delegates to carry out supporting practical work.

For a selection of some of the test methods readily available see www.pra-world.com/technical/testing.htm

Description

All coatings undergo phase changes during their life history. For a majority they are liquid during manufacture, storage and application. Following conversion to a dry film they acquire important, albeit slowly changing, solid-state properties which enable their protective and decorative functions.

The course will have a strong practical emphasis enabling delegates to:-

Understand the principles and consequences of key coating attributes including

  • Wet Film
    • Viscosity & Rheology
    • Surface Tension
  • Dry Film
    • Mechanical Properties
    • Adhesion
    • Permeability
    • Opacity
    • Gloss & Sheen

Quantify test precision in terms of repeatability and reproducibility. Understand the concept of 'Test Capability' in relation to control limits and specification.

Identify test methods and protocols from National, European and International sources.

Be aware of the correlation and limitations between test results and practical performance.

Carry out practical application and testing of paints using established test methods. Subject to prior notice every attempt will be made to meet delegates specific interests.

Note: The measurement and control of Colour is dealt with as a separate course and is not covered here. See
Colour Measurement and Colour Control and
Advanced Colour Measurement and Colour Control

Who Should Attend

This course is designed for all those working on the development, specification, and quality control of coatings where the use and interpretation of test methods is required.

The course is aimed towards all those requiring a thorough grounding in paint and surface coatings testing and will be particularly useful to technical personnel from raw material suppliers, paint manufacturers and end users. No specific qualifications are required but a gain maximum benefit a basic knowledge of science would be useful.

Tutors

Mrs Tessa Winter – Head of Testing Services, PRA

Mr Jon Graystone – Principal Research Scientist, PRA

Mr Anthony Buxton – PRA Consultant

Venue

PRA, Hampton, Middlesex, UK

Dates and Times

25–26 November 2008

24–25 November 2009

The workshop starts at 9.30am and finishes at 5.00pm on the first day and at 4.00pm on the second day.

Course Prices

2008

£680 – PRA Members

£795 – Standard

2009

£715 – PRA Members

£835 – Standard

Prices are per delegate and include VAT, all course materials, tea, coffee and a light lunch. Prices do not include accommodation.

Registration

To book your place use our online registration form.

More Information

For further details contact Elisabeth Brown