Question

Caustic embrittlement is avoided by adding___softening agent​

Answer 1

Answer:

Caustic embrittlement can be avoided : by using sodium phosphate as softening agent, instead of sodium carbonate ; by adding tannin or lignin to boiler water, since these blocks the hair-cracks, thereby preventing infiltration of caustic soda solution in these; by adding sodium sulphate to boiler water.

Explanation:

Answer 2

Caustic embrittlement is avoided by adding sodium