1980-02-01

Theoretical and Practical Considerations of Sheet Steel Surface Cleanliness 800149

Paint failure on cold-rolled sheet steel occurs by cathodic delamination of the paint film. Steel exposed at discontinuities in the paint coating becomes the anode of an electrochemical corrosion cell, and adjacent areas under the paint become the cathode of that cell. Highly alkaline conditions are created under the paint severely weakening the coating system bond at the pretreatment/steel interface. Nonuniformly distributed amorphous surface carbon contamination is primarily responsible for the variable paint performance observed. Adjusting mill practices in pickling, tandem rolling, and annealing resulted in improved steel surface cleanliness.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X