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Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
Publisher: Cengage Learning
ISBN: 9781305494695

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BuyFindarrow_forward

Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
Publisher: Cengage Learning
ISBN: 9781305494695
Chapter 2, Problem 21R
Textbook Problem
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Why must metal that has been used before be cleaned prior to welding?

To determine

The reason for cleaning the used metals before welding.

Explanation of Solution

To obtain the best results, one must clean the metals before welding. Any impurity in the welding area could react with some other elements within or outside of the welding area producing defective welding. Since the reactivity of the contaminants at high temperature is more, these reactions are highly favorable because the reactivity of the contaminants at high temperature is more. Also, the impurities may result to inclusions, porosity or poor appearance, and it may also cause extra operation cost for rework or post-processing.

Whether new or old, all metals must be cleaned before welding...

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Chapter 2 Solutions

Welding: Principles and Applications (MindTap Course List)
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