Caustic embrittlement is due to ans. low alkaline water high alkaline water Strong acidic water None of the above

Caustic embrittlement is a phenomenon primarily associated with the effects of high alkalinity in water, particularly in boiler systems. When water contains a high concentration of hydroxide ions (from caustic soda, for example), it can lead to the degradation of certain metals, particularly in high-stress environments.

This occurs because the alkaline environment promotes the formation of cracks and fissures in metals, especially in steel, which can cause a significant reduction in the tensile strength of the material. The high pH environment aids in the diffusion of hydrogen into the metal, leading to a form of brittle fracture known as hydrogen embrittlement.

Given the four options:

1. Low alkaline water
2. High alkaline water
3. Strong acidic water
4. None of the above

The most appropriate answer to the question about caustic embrittlement is:

High alkaline water.

This indicates that caustic embrittlement is indeed due to conditions where the water has a high pH, typically above 10-11, which is considered alkaline.