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Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695

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BuyFindarrow_forward

Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695
Textbook Problem
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What type of porosity is most often caused by mill scale?

To determine

The type of porosity caused by mill scale.

Explanation

The mill scale can be identified as the layer of oxide of iron in dark grey or black color. The mill scale offers to protect the hot rolled steel from the rusting.

Mill scale makes the welds not suitable for service thus, it is important to remove the mill scale before welding the material. The adverse effects of mill scale are reversed by the fluxes and some filler metals with deoxidizing properties...

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