Which of the following is function of fluoride flux in soldering process ?
Correct answer: B. It prevents the formation of chromium oxide or dissolves chromic oxide layer
- A. It prevents the formation of copper oxide
- B. It prevents the formation of chromium oxide or dissolves chromic oxide layer
- C. It prevents the flow of material in undesirable area
- D. Increase the strength of solder
Explanation
Fluoride flux is especially important with chromium-containing alloys because it dissolves or disrupts the tenacious chromium oxide layer that prevents solder wetting. It does not strengthen the solder or control its flow by itself.
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