HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
News
Materials & Assembly

Fruit Juice Guards Against Aluminum Corrosion

NO RATINGS
View Comments: Oldest First|Newest First|Threaded View
Page 1/2  >  >>
Beth Stackpole
User Rank
Blogger
Surprise finding
Beth Stackpole   10/10/2012 7:20:36 AM
NO RATINGS
Given what sugars and fruit juice can do to the enamel on one's teeth, this result is a surprise to me. I suppose teeth are far more porous than aluminum, which could explain some of the differences. Nevertheless, using juice extracts as a way to prevent corrosion as opposed to toxic materials--you can't argue with that kind of green development.

NadineJ
User Rank
Platinum
which tree?
NadineJ   10/10/2012 9:55:48 AM
NO RATINGS
@ Ann: Do you have the name of the tree (common or scientific)?  A friend just came back from Morocco and mentioned a tree that's being promoted heavily for export products.  I'm curious to see if it's the same tree.

naperlou
User Rank
Blogger
Re: Surprise finding
naperlou   10/10/2012 11:10:46 AM
NO RATINGS
Beth, that is an interesting development.  Using non-toxic organics will probably result in production processes that are less toxic as well.  Then the issue is can we grow enough of the organic compound to keep up.  I doubt that is an issue with dates.

Ann R. Thryft
User Rank
Blogger
Re: Surprise finding
Ann R. Thryft   10/10/2012 12:04:19 PM
NO RATINGS
Beth, it's not just a difference in porosity between tooth enamel and aluminum, it's the fact that they are entirely different physical and chemical structures. What happens between aluminum and the fruit juice extract is an electrostatic interaction, which is very different from what occurs between that extract and enamel.

Ann R. Thryft
User Rank
Blogger
Re: which tree?
Ann R. Thryft   10/10/2012 12:04:58 PM
NO RATINGS
Nadine, we give the tree's name in the article. It's the date palm (Phoenix dactylifera L.).

Ann R. Thryft
User Rank
Blogger
Re: Surprise finding
Ann R. Thryft   10/10/2012 12:05:36 PM
NO RATINGS
Lou, you're right--date palms are grown very widely. OTOH, depending on how many it takes to produce the extract, that could interfere with production of food crops and medicine crops.

NadineJ
User Rank
Platinum
Re: which tree?
NadineJ   10/10/2012 12:11:56 PM
NO RATINGS
Thanks.  I read the article twice looking for the name and still missed it.

Dave Palmer
User Rank
Platinum
Effect on corrosion rate?
Dave Palmer   10/10/2012 3:15:26 PM
NO RATINGS
@Ann: If you have access to the article, can you tell us what the Icorr is, with and without the coating?

Icorr is the corrosion current (usually measured in mA/cm²), and is directly related to the corrosion rate.  For example, if Icorr without the coating is 4 times more than Icorr with the coating, then the coating reduces the corrosion rate by a factor of 4.

In an article released earlier this year, Dr. Gerengi showed that the extract of a certain South American hardwood tree could reduce the corrosion rate of low carbon steel in hydrochloric acid by as much as factor of 3.

While this research into "green" corrosion inhibitors is interesting, the effects documented so far have been relatively modest.  Many commercial corrosion inhibitors and coatings can reduce corrrosion rates by a factor of 10 or more.

Also, there are cultural issues that might hamper the adoption of such "green" corrosion inhibitors.  If I suggested to management that we begin using fruit juice as a corrosion inhibitor for aluminum, I doubt it would be taken seriously.

Ann R. Thryft
User Rank
Blogger
Re: Effect on corrosion rate?
Ann R. Thryft   10/10/2012 3:54:09 PM
NO RATINGS
Dave, corrosion current density values (Icorr) appear several times in different contexts. Without an inhibitor it's 3.47, at 100 ppm it's 2.32, at 500 1.84, at 1500 1.25 and at 2000ppm it's 0.98.
Regarding management not taking to the idea of using fruit juice, I think that has more to do with our Western culturally-induced industrial paradigms. People in other areas of the world, usually with a less complex economic infrastructure and greater reliance on local natural resources, take this research and its potential applications seriously. We have much to learn, or re-learn, it seems to me.

Charles Murray
User Rank
Blogger
Future use
Charles Murray   10/10/2012 5:53:58 PM
NO RATINGS
Ann, any idea how this knowledge might be employed in future materials?

Page 1/2  >  >>
Partner Zone
Latest Analysis
With major product releases coming from big names like Sony, Microsoft, and Samsung, and big investments by companies like Facebook, 2015 could be the year that virtual reality (VR) and augmented reality (AR) finally pop. Here's take a look back at some of the technologies that got us here (for better and worse).
Good engineering designs are those that work in the real world; bad designs are those that don’t. If we agree to set our egos aside and let the real world be our guide, we can resolve nearly any disagreement.
The Industrial Internet of Things is bringing a previously reluctant process industry into the wireless fold. The ability to connect smart sensors to the Internet has spiked the demand for wireless devices in process manufacturing, according to the new study from ARC Advisory Group.
If you’re developing an embedded monitoring and control application, then you’ll want to take note of the upcoming Design News Continuing Education Center class, “Embedded Development Using Microchip Microcontrollers and the CCS C Compiler."
US factory orders for durable goods tumbled 3.4% in December on a big drop in new bookings for commercial aircraft, according to data the Commerce Department released Tuesday.
More:Blogs|News
Design News Webinar Series
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.m. New York
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jan 26 - 30, IPv6 for Micros – Hands-On
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Last Archived Class
Sponsored by Stratasys
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service