____________ is a form of environmental cracking that can initiate on the surface of high strength low alloy steels and carbon steels with highly localized zones of high hardness in the weld metal and HAZ as a result of exposure to aqueous HF acid service.

Exposure to high solution strength caustic can result in general corrosion or high corrosion rates above ________.

Time to failure by thermal fatigue is primarily affected by:

What method is most used to assure boiler feed water corrosion is not occurring?

Proper application of ________ will control but not eliminate microbes that cause MIC so that continued treatment is necessary.