8/3/2019 Functional Coating

1/14

Corrosion protection class projectProfessor: Dr. peykariGathered by: farajollah farahnak

8/3/2019 Functional Coating

2/14

8/3/2019 Functional Coating

3/14

Top coat

Intermediate

Primer

substrate

Coating system

8/3/2019 Functional Coating

4/14

Functional coating describes systems which possess beside theclassical properties of the coating(i.e., decoration and protection),anadditionalfunctionality

8/3/2019 Functional Coating

5/14

Anticorrosive coatings

Scratch resistant coatings

Self cleaning coating

Antibacterial coatings

Antifouling coatings

Self healing coatings

8/3/2019 Functional Coating

6/14

Sacrificialmeans

Zinc-rich coatings developed to protect metal substrates

Barrier effect

Pigments having lamellar or plate like shape are introduceto polymeric coatings

inhibition

These pigments form a protective oxide layer on themetallic substrate

8/3/2019 Functional Coating

7/14

In order to obtain optimum scratch resistance the correctcombination of hardness and flexibility is required

8/3/2019 Functional Coating

8/14

8/3/2019 Functional Coating

9/14

8/3/2019 Functional Coating

10/14

Self healing

The most common strategies to provide self healingability for coatings are micro/nanocapsules embedment ,hollow fiber embedment , microvascular system.

8/3/2019 Functional Coating

11/14

Micro/nanocapsules synthesis

There are several methods to synthesis microcapsulessuch as interfacial polymerization, coacervation,extrusion, sol-gel and in-situ polymerization

8/3/2019 Functional Coating

12/14

In situ poymeization

8/3/2019 Functional Coating

13/14

8/3/2019 Functional Coating

14/14

References

Swapan kumar ghosh, functional coating, john wily andsons, wienhiem 2006M. samadzade, s. hatami, prog. Org. coat.68(2010)

P.A. Schweitzer, Paint and Coatings, CRC Press, 2006.

C. Suryanarayana, K. Chowdoji Rao, D. Kumar, Prog. Org.Coat. 63 (2008)