The Dexmet Blog

The latest in engineering and manufacturing news, trends and insights straight from the Dexmet experts.

Blog Feature

Advanced Battery Material  |  Aerospace Technology  |  Alternative Power  |  Composites  |  Copper  |  Expanded Filtration Mesh  |  Expanded Materials  |  Expanded Metal for Shielding  |  Expanded Metals  |  Expanded material  |  Expanding Technology  |  Filter Media Support  |  Fuel Cells  |  Hydrogen Generation  |  Lightning Strike Protection  |  Mesh  |  Precision Mesh  |  Solar Applications  |  Solar Energy  |  Turbine Blades  |  Wind Power  |  Wire Mesh

What effect does tarnish on copper have on product parameters?

This is one of the more common questions that we are asked. Customers are primarily concerned with adhesion and surface resistance. Does the surface resistance increase with increased tarnish levels?  Will epoxy adhere to a tarnished copper surface? To try and provide an answer, we undertook some elementary evaluations of copper samples with varying levels of tarnish identified using the L*a*b* color space coordinates. For those unfamiliar with the L*a*b* system, the short answer is that every color can be defined in terms of 3 numbers.  The first number, “L”, is for lightness which ranges from 0-100, with 0 being black and 100 being white. Everything else is shades of gray. The second number, “a”, is either positive (Red) or negative (green). The third number, “b”, is either positive (yellow) or negative (blue).  That is it in a nutshell. All shades of copper and its tarnish can be defined in this way.

Read More

Blog Feature

Advanced Battery Material  |  Aerospace Technology  |  Alternative Power  |  Aluminum  |  Cathodic Protection  |  Composites  |  Copper  |  Expanded Aluminum  |  Expanded Filtration Mesh  |  Expanded Materials  |  Expanded Metal for Shielding  |  Expanded Metals  |  Expanded Rhodium  |  Expanded material  |  Filtration Media  |  Fuel Cells  |  Hydrogen Generation  |  Lightning Strike Protection  |  Lightning Strike Technology  |  Lightning Strike Techology  |  Metal Mesh  |  Oxygen Generation  |  Solar Applications  |  Solar Energy  |  Thin Expanded Metal Foils  |  Wind Power  |  Wire Mesh  |  intricate shapes  |  wire cut edm

2011 in review

The WordPress.com stats helper monkeys prepared a 2011 annual report for this blog.

Read More

Subscribe Now

Get the latest engineering insights sent straight to your inbox.