Date Range
Date Range
Date Range
Lesson learn and Know how For Engineering. Friday, July 17, 2015. Is a destruction of a material by reaction with its environment. Life would be simple if all corrosion were uniform as shown in this slide - the rusting of steel in air. Just run a corrosion test to determine a corrosion rate, and then use enough. Here is an example of pitting .
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Ancient Astronomic Observations - and Time. Saturday, August 10, 2013. Ancient Astronomic Observations - and Time. Observations of the sky have always been the foundation of the concept of time. However, the concept of time has been very different through the ages and cultures.