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Which of the following is/are the characteristics of the Knife-line attack?

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Which of the following is/are the characteristics of the Knife-line attack?

(a) KLA occurs immediately adjacent to the weld

(b) KLA occurs in the stabilized steels only

(c) KLA occurs in the non-stabilized steels only

(d) KLA occurs in the stabilized steels and it occurs immediately adjacent to the weld

The question was asked by my college professor while I was bunking the class.

Query is from Eight Forms in division Eight Forms of Corrosion of Corrosion Engineering

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Right choice is (d) KLA occurs in the stabilized steels and it occurs immediately adjacent to the weld

Easiest explanation: KLA occurs in a narrow band in the parent metal adjacent to weld and it occurs in the stabilized steels that are alloyed with niobium, titanium, and columbium.

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