Friday, July 25, 2014
PLACERVILLE, CALIFORNIA
99 CENTS

New coating for aluminum developed

By
From page B1 | November 26, 2012 |

RENO, Nev. – A research team at the University of Nevada, Reno has developed a new environmentally-friendly coating for aluminum to replace the carcinogenic chromate coatings used in aerospace applications. The chromate conversion coatings have been used for more than 50 years to protect aluminum from corrosion.

Attempts to replace chromate coatings with non-toxic coatings have been under way since the 1980s.  The awareness on effects of chromates was brought to the forefront in 1993 by the real-life incident involving Erin Brokovich and depicted in the movie released in 2000 of the same name. Although the use of chromates for consumer and automotive applications has been banned, it is still in use by the defense and aerospace industries under various exemptions.

The carcinogenic coatings were exempted from the ban due to unavailability of suitable replacement combined with the high human and financial cost of failure from corrosion. The search for a suitable replacement has been elusive primarily due to one main characteristic of the coating referred to as “self-healing,” the ability of the coating to heal itself after being damaged or scratched.

When scratched, the coating components from nearby sites migrate to the damaged region and re-protect the underlying alloy. A short video of the coating formation is on Chidambaram’s Website, www.electrochemical.org/ under the heading “Cool Videos.”

Chidambaram’s formulation performs comparably to the chromate formula in its ability for self-healing, which is important to the defense and aerospace industry. The coating can be applied to all aluminum products. The new formula creates an environmentally-benign molybdate-based coating that provides corrosion protection to aluminum, used for aircraft and spacecraft. These coatings, when damaged, will re-heal themselves.

The University of Nevada, Reno team developed and tested more than 300 coatings before arriving at this formulation. They used a complimentary suite of advanced surface analytical techniques such as Raman microspectroscopy, Fourier transform infrared spectroscopy, energy dispersive spectroscopy, secondary ion mass spectroscopy and X-ray photoelectron spectroscopy to conclusively prove the presence of molybdate in the scratched region.  Further, using electrochemical testing, the team showed the coating re-protected itself via self-healing upon scratch test.

Comments

comments

Mike Wolterbeek

.

News

 
Scaffolding issue makes for contentious meeting

By Wendy Schultz | From Page: A1, 2 Comments | Gallery

 
District 2: Candidates debate jobs versus lifestyle

By Dawn Hodson | From Page: A1, 2 Comments | Gallery

Accident: 1 bullet hits 2

By Cole Mayer | From Page: A1

 
Help available for breastfeeding mothers

By Health and Human Services Agency | From Page: A3

 
El Dorado County School Board vacancy

By El Dorado County Office of Education | From Page: A8

 
.

Opinion

Popular science

By Mountain Democrat | From Page: A4

 
The weekly Daley: A good time to be there…

By Chris Daley | From Page: A4

Something to think about: More than what you see

By Wendy Schultz | From Page: A4

 
.

Letters

Support of Director Prada

By Letters to the Editor | From Page: A5

 
Uphold the Third Amendment

By Letters to the Editor | From Page: A5

Bureaucracy

By Letters to the Editor | From Page: A5, 1 Comment

 
Imagination Theater’s play

By Letters to the Editor | From Page: A5

Watch whom you’re calling ‘conservative’

By Letters to the Editor | From Page: A5Comments are off for this post

 
Fake ‘small farms’ steal from residential EID customers

By Letters to the Editor | From Page: A5Comments are off for this post

People of Placerville

By Letters to the Editor | From Page: A5

 
Computer scam phone calls

By Letters to the Editor | From Page: A5

.

Sports

Sports Scene: July 24, 2014

By Democrat Staff | From Page: A6

 
Quarter century later, Rypien wins ACCG again

By Andrew Hazard | From Page: A6 | Gallery

Outside with Charlie: Paddle time

By Charlie Ferris | From Page: A6

 
Midget Lites join tomorrow’s action

By Bill Sullivan | From Page: A6

El Dorado rallies for last-inning victory

By Mike Bush | From Page: A6

 
Rush sit a win from Series

By Jerry Heinzer | From Page: A7

Tasmanian Devils go undefeated

By Patty Pope | From Page: A7

 
.

Prospecting

El Dorado wines win in Amador

By Democrat Staff | From Page: B1

 
Things to do: July 25, 2014

By Democrat Calendar | From Page: B2

Suds entice the taste buds

By Krysten Kellum | From Page: B2 | Gallery

 
Rhythm and Views goes bluesy

By | From Page: B3

Have an Hawaiian vacation at Carson Road wineries

By Carson Road Winery Asociation | From Page: B3Comments are off for this post | Gallery

 
Summer fun is happening in Twain Harte

By Fire On | From Page: B4Comments are off for this post

Manzanita doubles the music

By Table Nectar And Manzanita | From Page: B5

 
Recording artist at Busby Cellars

By News Release | From Page: B6

Hands4Hope hosts school supply drive

By News Release | From Page: B6

 
Supergroup plays Harris Center

By Carrera Productions | From Page: B6

Artists invited to go western

By Art On The Divide | From Page: B7

 
Visit Tahoe artists during tour

By Special to the Democrat | From Page: B7

Reggae on the River celebrates 30 years

By Reggae On | From Page: B7Comments are off for this post

 
.

Essentials

Lake levels 7-24-14

By Michael Raffety | From Page: A2

 
Crime Log: July 11-13

By Cole Mayer | From Page: A2

Building permits 7/7-11/2014

By Michael Raffety | From Page: A2

 
.

Obituaries

Wallace Murrel Thomas

By Contributor | From Page: A2

 
.

Real Estate

How to have a garden party, minus the whining

By Marni Jameson | From Page: HS3

 
Most common mistakes homebuyers make

By Ken Calhoon | From Page: HS4

.

Comics

Speed Bump

By Contributor | From Page: A9

 
Tundra

By Contributor | From Page: A9

Working It Out

By Contributor | From Page: A9

 
Shoe

By Contributor | From Page: A9

Sudoku

By Contributor | From Page: A9

 
Rubes

By Contributor | From Page: A9

TV Listings

By Contributor | From Page: A9

 
New York Times Crossword

By Contributor | From Page: A10

Horoscope, Sunday, July 27, 2014

By Contributor | From Page: A10

 
Horoscope, Saturday, July 26, 2014

By Contributor | From Page: A10

Horoscope, Friday, July 25, 2014

By Contributor | From Page: A10

 
.

Home Source

How to have a garden party, minus the whining

By Marni Jameson | From Page: HS3

Most common mistakes homebuyers make

By Ken Calhoon | From Page: HS4