Resistance of nanostructured titanium dioxide coatings to erosion corrosion

Authors: Ahmad, Z.1; Aleem, Abdul B.J.2

Source: Tribology - Materials, Surfaces & Interfaces, Volume 3, Number 1, March 2009 , pp. 41-48(8)

Publisher: Maney Publishing

Key:
Free Content - Free Content
New Content - New Content
Subscribed Content - Subscribed Content
Free Trial Content - Free Trial Content

Abstract:

Investigations were undertaken to determine the erosion corrosion resistance of nanostructured titanium dioxide coatings in 5 vol.-%-3·5 wt-% NaCl slurry at velocities ranging from 1 to 4 m s-1 in a recirculating loop. Two types of nanopowders, spray dried and densified (AE 9342) and chemically precipitated and spray dried (AE 9303) were used. The results were compared with a conventional TiO2 coated samples (SM 102). Specimen AE 9342 showed a higher resistance compared to AE 9303. No localised corrosion on the above specimen was observed. The erosion corrosion was caused by etching of intersplat boundaries. The erosion corrosion is dependent on surface topography. A homogeneous distribution of nanoagglomerates of unmelted, partially melted nanoparticles embedded in coatings, a large area of melted zone and porosity less than 1% enhances the erosion corrosion resistance of nanostructured titanium dioxide coatings.

Keywords: NANOSTRUCTURED COATINGS; EROSION CORROSION; PLASMA AIR SPRAYING; SPLATS LAMELLAE; SPRAYING KEY PARAMETERS; SURFACE TOPOGRAPHY

Document Type: Research article

DOI: 10.1179/175158309X419070

Affiliations: 1: Mechanical Engineering Department, King Fahd University of Petroleum and Mineral, Dhahran 31261, Saudi Arabia 2: Mechanical Engineering Department, King Fahd University of Petroleum and Mineral, Dhahran 31261, Saudi Arabia;, Email: abaleem@kfupm.edu.sa

The full text electronic article is available for purchase. You will be able to download the full text electronic article after payment.

$51.00 plus tax      Refund Policy

 

OR

Back to top

Key:
Free Content - Free Content
New Content - New Content
Subscribed Content - Subscribed Content
Free Trial Content - Free Trial Content
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages.
Page Help Click here for Page Help
Shopping cart
Tools
Sign in






Need to register?
Sign up here
Text size: A | A | A | A