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Friday, June 17, 2011

Power tools such as power wire brushes can burnish or polish a steel surface. Why is this sometimes a problem?

Polished surfaces require more primer
Polished surfaces develop rust bloom that interferes with coatings adhesion
Burnishing destroys surface profile and mechanical adhesion of the coating
Burnishing makes the surface a better conductor of current and therefore accelerates corrosion

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Previous Quizzes from the Past Week

Thursday, June 16, 2011
What is most likely to help you achieve the specified profile on the steel you are blast cleaning?

Wednesday, June 15, 2011
A conductivity meter can be used to check for what contaminant on abrasive?

Tuesday, June 14, 2011
How is film build normally achieved during the thermal spray process?

Monday, June 13, 2011
What is the minimum oxygen content of air suitable for breathing?

Friday, June 10, 2011
In conventional air spraying, which of the following spray techniques is wrong?


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