PC WEATHER SUSTAINABILITY

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POWDER COATING WEATHER SUSTAINABILITY

Substrate

Pretreatment

Primer

Topcoat

Coating thickness (um)

Environmental Corrosivity Class

C1-C3

C4

C5

Aluminum

Chromatation

-

PT

80

C

B

*

Chrome free chemical

EM

PT

130

C

C

*

Conversion layer

-

PT

80

B

-

-

Oxyprim (Wash primer)

EM

PT

130

B

A

-

Steel

Metallisation

-

PT

80

C

A

-

Shotblasting

Zincoprim

PT

130

C

B

-

Primer KTL

-

PT

80

A**

-

-

Iron Phosphatation

EM

PT

130

A**

-

-

Chromation

EM

PT

130

C

C

*

POWDER COATING WEATHER SUSTAINABILITY

Legend

Expected lifetime

A 2 – 5 years *: to be checked

B 5 – 10 years **: if C1 = > 10 years

C > 10 years EM: Epoxy powder primer PT: Polyester topcoat

Environmental class

C1 = Very low C2 = Low C3 = Intermediate

C4 = High C5 = Very high (industrial) C5-M = Marine