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The process of scale removal in manufacture tinplate is known as ______

(a) pickling

(b) leaching

(c) flaming

(d) charring

I got this question in examination.

The question is from Manufacture of Tinplate topic in division Metal Packaging Materials of Food Packaging Technology

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The correct choice is (a) pickling

Easiest explanation: The process of scale removal in manufacture tinplate is known as pickling. The thick slabs are hot rolled down to about 2 mm and, during this process, substantial layers (0.01 mm thick) of oxides or scale are formed as a consequence of the steel being heated to elevated temperatures for rolling.

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