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The Impact Of Temperature On Common Paint Defects

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In this presentation, we will demonstrate the impact of temperature-based viscosity variations on spray patterns.

Published in: Devices & Hardware
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The Impact Of Temperature On Common Paint Defects

  1. 1. THE IMPACT OF TEMPERATURE ON COMMON PAINT DEFECTS Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 1
  2. 2. • DESIGNERS AND MANUFACTURERS OF ADVANCED POINT-OF-USE TEMPERATURE AND VISCOSITY CONTROL SYSTEMS FOR INDUSTRIAL FLUID DISPENSING PROCESSES SINCE 1990 • SPECIALIZING IN BOTH RECIRCULATING AND “DEAD-END” SYSTEMS WITH MORE THAN 3500 ACTIVE INSTALLATIONS • LOW VISCOSITY (<1 CPS) TO HIGH VISCOSITY (>1,000,000 CPS) APPLICATIONS STANDARD AT PRESSURES FROM 0.4 BAR (5 PSI ) – 400 BAR (6000 PSI) Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 2
  3. 3. SO WHO CARES? • THOSE 3500+ TEMPERATURE CONTROL INSTALLATIONS INVOLVED SOME OF THE TOUGHEST APPLICATIONS IN PARTNERSHIP WITH DEMANDING CUSTOMERS LIKE: Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 3
  4. 4. (Valspar - 080 White Polyester) Data Courtesy of Alsco Metals Corporation 10 15 20 25 30 35 40 45 50 55 60 15 20 25 30 35 40 Temperature (°C) Viscosity (Zahn#4Seconds) PAINT VISCOSITY VS. TEMPERATURE Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 4
  5. 5. Data Courtesy of Sherwin-Williams Corporation TEMPERATURE VS. VISCOSITY BY COLOR Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 5
  6. 6. FACTORS THAT AFFECT TEMPERATURE • PAINT AREA AMBIENT TEMPERATURE • PAINT STORAGE TEMPERATURE • VOLUME OF PAINT IN SOURCE CONTAINER • PAINT FLOW RATE • RECIRCULATION RATE • RECIRCULATION PATH • PAINT PRESSURE SETTINGS • PUMP TYPE / HORSEPOWER • SHEAR (REGULATOR, NOZZLE, FITTINGS, ETC.) Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 6
  7. 7. IMPACT OF TEMPERATURE VARIATIONS • PAINT TEMPERATURE INVERSELY AFFECTS VISCOSITY • HIGHER TEMPERATURE = LOWER VISCOSITY • IMPROVED FLOW-OUT (SURFACE FINISH) • REDUCED FLASH-OFF TIMES • FASTER CURE TIMES • LOWER TEMPERATURE = HIGHER VISCOSITY • REDUCED FLOW-OUT • INCREASED FILM THICKNESS • SLOWER CURE TIMES Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 7
  8. 8. IMPACT OF TEMPERATURE VARIATIONS • ON PROCESS: • ATOMIZATION • TRANSFER EFFICIENCY • FILM BUILD • FLOW OUT • CURE RATE • UNPREDICTABLE SETUPS • VARIATIONS DURING RUN • ON QUALITY: • DRY FILM BUILD • COLOR SHIFT • RUN & SAG • ORANGE PEEL • GLOSS ISSUES • POOR ADHESION • BLISTERING/POP Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 8
  9. 9. TEMPERATURE RELATED DEFECTS • DRY SPRAY • HIGHER PAINT TEMPERATURE • SMALLER DROPLET SIZE • SOLVENT EVAPORATES BEFORE PARTICLE HITS PART • COLOR SHIFT • COLOR IS OFTEN RELATED TO FILM BUILD • LOW FILM CAN’T HIDE SUBSTRATE/PRIMER • HIGH FILM CAN DISTURB FLAKE LAY IN METALLICS Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 9
  10. 10. TEMPERATURE RELATED DEFECTS • RUN & SAG • LOW VISCOSITY + HIGH FILM • HIGH VISCOSITY + HIGH FILM • GLOSS ISSUES • UNEVEN FILM • IMPROPER FLOW OUT • ORANGE PEEL • EXTREME FILM VARIATION • IMPROPER FLOW OUT Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 10
  11. 11. THE PERFECT FILM STRIPSTRIPSubstrate Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 11
  12. 12. THE STRUCTURE OF ORANGE PEEL Substrate Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 12 Short Variations Long Variations
  13. 13. TEMPERATURE RELATED DEFECTS • ADHESION ISSUES • UNEVEN FILM • IMPROPER FLOW OUT • SOLVENT TRAPPED UNDER CURED SURFACE • BLISTERING & POP • UNEVEN FILM • MORE SOLVENT TRAPPED UNDER CURED SURFACE • SOLVENT PRESSURE EXCEEDS FILM STRENGTH Saint Clair Systems © All rights reserved ISO 9001:2000 Certified 13
  14. 14. THE EFFECT OF FILM BUILD ON CURE Slower Cure Faster Cure Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 14 Substrate
  15. 15. FILM BUILD RELATED DEFECTS Blisters/Uncured Coating Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 15 Substrate
  16. 16. THANK YOU!! PLEASE COME SEE US AT: www.viscosity.com AND VISIT OUR BLOG AT: blog.viscosity.com/blog AND OUR YOUTUBE CHANNEL: https://www.youtube.com/channel/UCVyAgTJtgNZTozqFeBc CeNA Saint Clair Systems © All rights reserved ISO 9001:2016 Certified 16

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