International. In a research paper, two scientists discuss evidence for anticorrosive paints and provide numerous references to support their options.
The paper begins by presenting a mechanism for the way anticorrosive paints work. This builds on previous work on understanding the mechanism, but places greater emphasis on keeping the metal oxide film under the paint as the essential feature. If this mechanism is correct, then it suggests several properties that a paint coating should have. In many cases a minimum value of these properties is all that is required. In some cases, for example, DC resistance, it is advantageous to have the highest possible value of this property at first due to degradation over time.
The paper details a number of tests, chosen by the authors for their relative simplicity, to measure these properties in a quantitative way and therefore to aid in the formulation of new or improved coatings. These tests are the personal selection of the authors and they admit that others can make different decisions. These tests have been divided into those that are best conducted in the free paint film and those that are conducted on the metal and paint together, the latter includes a test that will be performed on the metal alone.
Among the second group, suggestions have been made for electrochemical tests that are not destructive and can therefore be used for quality control and monitoring. There is a brief discussion of accelerated testing with emphasis again on quantitative methods of non-destructive evaluation. Numerous relevant references are provided. The work concludes with suggestions for future work.
Source: www.sciencedirect.com
