Nanocoating involves depositing a thin layer less than 100 nm thick onto a substrate to improve or add new properties. Conventional coatings can have issues like poor adhesion, flexibility, strength, abrasion resistance and durability, but nanocoatings can solve these issues. Common nanocoating techniques include sol-gel, layer-by-layer deposition, dip coating, spin coating, plasma-assisted deposition, electrochemical deposition, vapor deposition, and pulsed laser deposition. Nanocoatings have various applications including self-cleaning, depolluting, UV protection, anticorrosion, insulation, water sheeting and beading, antifouling, and anti-graffiti coatings.

1. Unit I
Diploma Course
B.Sc III

3. Introduction of Nanocoating
Nanocoating is a process by which a thin layer of thickness about
<100 nm is deposited on the substrate for improving some
property or for imparting new functionality.
(i) improper adhesion between coating layer and substrate,
(ii) less flexibility,
(iii) strength loss,
(iv) poor abrasion resistance and
(v) less durability .
These issues of conventional coatings can be solved by
nanocoatings.

4. There are several nanocoating techniques which
mainly are
(1) Sol-gel
(2) Layer-by-layer (LBL)
(3) Dip coating
(4) Spin coating
(5) Plasma or ion-beam assisted techniques
(6) Electrochemical deposition
(7) Vapour deposition
(8) Pulsed laser deposition

5. Sol-gel Method

6. Layer-by-layer (LBL)
Product

7. Dip coating

8. Spin coating

9. Ion beam deposition (IBD) is a process of applying
materials to a target through the application of a
charged particle beam of ions to which other ions are
then accelerated, focused, or deflected using high
voltages or magnetic fields
Ion-beam assisted techniques

10. Electrochemical deposition

11. Vapour Deposition

12. Pulsed laser deposition

13. Future Of Nanocoating industries
There are a number of areas where coatings nanotechnology is
currently commercially available. Those are:
• Self-cleaning coatings
• Depolluting coatings
• Ultraviolet (UV) light protective coatings
• Anticorrosion coatings
• Insulative nanocoatings
• Water sheeting coatings
• Water beading coatings
• Antifouling coatings
• Anti-graffiti coating

15. Plasma layer Deposition

16. Plasma-Enhanced Atomic Layer Deposition also called ALE
(Atomic Layer Epitaxy), Atomic Layer Deposition (ALD) is a deposition
method that was introduced by Dr. Suntola in 1974, and has the capability
of controlling the deposition thickness of thin films to the order of one
atomic monolayer.

17. Physical Vapour Deposition

18. Advantages
 PVD coatings are sometimes harder and more corrosion-resistant than
coatings applied by electroplating processes. Most coatings have high
temperature and good impact strength, excellent abrasion resistance and
are so durable that protective topcoats are rarely necessary.
 PVD coatings have the ability to utilize virtually any type of inorganic
and some organic coating materials on an equally diverse group of
substrates and surfaces using a wide variety of finishes.
 PVD process are often more environmentally friendly than traditional
coating processes such as electroplating and painting.
 More than one technique can be used to deposit a given film.
Disadvantages
 Specific technologies can impose constraints; for example, the line-of-
sight transfer is typical of most PVD coating techniques, however, some
methods allow full coverage of complex geometries.
 Some PVD technologies operate at high temperatures and vacuums,
requiring special attention by operating personnel and sometimes a
cooling water system to dissipate large heat loads.

19. Applications
 Decorative applications
 Cutting tools
 Aerospace industry
 Architectural ironmongery, panels, and sheets
 Automotive industry
 Dyes and molds
 Firearms
 Optics
 Watches
 Jewelry
 Thin film applications

20. Atomic Layer Deposition

21. Chemical Vapor Deposition
Fig 1.1
Fig 1.2

22. Sputtering Method

23. Anodization Method

24. Powder Coating Method

25. Spray coating method

26. Applications Of Nanocoatings