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TECHNICALHELP4U

Powder Coating Made Easy

PowderCoating101

TECHNICALHELP4U

Powder coating made easy: Powder Coating 101

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INTRODUCTION

1

WHAT IS POWDER COATING?
2
Why should we use Powder Coatings? 3
How are Powder Coatings Made?
4
Powder Coating Types: ThermosetPowder Coating
5
Powder Coating Chemistry: Thermoplastic
Powder Coating
5
Thermoset Powder Coating Types:
Urethane Acrylic
9
Thermoset Powder Coating Types: GMA
Acrylics
9

POWDER COATING HEALTH &
SAFETY
11
General Powder Coatings Health and
Safety Points:
12

POWDER COATING
PRETREATMENT
The Importance o f Cleaning
The Fundamentals of Cleaning
Common Chemical CleaningConversion Coating
Zinc Phosphatizing
How to Phosphatize
Rinsing

POWDER COATING
APPLICATION

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22

Powder Coatings Application:
Application Equipment
22
Fluidized Bed
22
Electrostatic Powder Spray Coating
24
Electrostatic Powder Spray Coating,
Corona Gun.
24
Electrostatic Powder Spray Coating,
25
Electrostatic Powder Spray Coating, Tribo
Gun.
27Electrostatic effectiveness
28
Operation Conditions
29
Powder Booth
31
Powder Fines
35

Heating Applications In Powder Coatings
35
Preheating
36
Postheating - Product Cure
36
Postheating - Process Considerations 37
Postheating - Hot Air, Gas or Electric
Convection Cure
37
Postheating - Infrared Radiation
38
Postheating - Ultraviolet Light & Electron
Beam
38
Oven Exhaust
39Oven Residue
40
Our thoughts on ovens:
41
Gas or Electric (convection and IR),
44
Oven Efficiency
44
What about UV
44
What about Temperature and Energy? 45
Application Conditions:
46
Excess Heat
46

POWDER COATING QUALITY
CONTROL
48
Evaluating finished film properties and
specifications
48
SPECULAR GLOSS
49
DIRECT/REVERSE IMPACT
50
VISUAL COLOR
51
DRY FILM THICKNESS52
FILM HARDNESS BY PENCIL TEST 53
MANDREL BENT TEST
(FLEXIBILITY)
54
ADHESION
55
SOLVENT CURE
56

10 STEPS TO SUCCESSFUL
POWDER COATING
57
10 Steps to Successful Powder Coating 57
Why should I use powder coating?
59
How long have powder coatings been
around?
59
What is the difference between
Thermoplastic
59
What Powder Coating Chemistry should I
buy?
60
What aboutPorcelain enamel
60
How should I prepare my parts for
powdercoating?
60
How do I spray Powder? What makes it
stick?
61
Why do I need a spray booth? How is the
powder reused?
61

What about curing ovens?
61
What is Transfer Efficiency?
62
Can I recoat parts? How?
62
Can I strip Powder coatings? How?
62
Care of Powder Coated Parts.
62
How do I change over from one powder to
anotherwithout contamination?
63
What is a Datapaq
64
Scratch and Dent Fillers
66
What maintenance does a powder system
need?
67
Tell me about grounding and powder
coating:
67
Efficiency reasons for grounding.

67

How can I test for sufficient ground

68

Obtaining good ground
Can I use powder as a primer for liquid
coatings? How?
Can I touch up powder coatings?
How do I takecare of color standards?
Where do I begin? What do I need to
powder coat?
Powder Application Rooms.
What can I powder coat?

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POWDER COATING SPECIAL
EFFECTS
76
Spices:
Applying metallics
Bonded/non Bonded powders
Deep Candy Apple
Candy Apple

POWDER COATING
TROUBLESHOOTING

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82

Sintered Powder
83
Proper powder application
83Dead Bed - No air percolating through
powder surface
83
Dusting - Powder blowing out of hopper
84
Stratification - Powder separating into
layers of fine and coarse particles
84
Poor powder feed
84
Impact fusion - Hard buildup in feed tubes
and orifices
85
Contamination in reclaim powder
85

Geysering - Air blowing large holes
through surface of powder.
85
Powder drifting from...