__________ is a change in the microstructure of steels after exposure in the 850º F to 1400º F range, where the carbide phases in carbon steels are unstable and may agglomerate from their normal plate-like appearance.

__________ is usually found in aqueous environments or services where water is sometimes or always present, especially where stagnant or low-flow conditions allow the growth of microorganisms.

Which of the following are affected by sulfidation?

Corrosion by HF (Hydrofluoric) acid can result in high rates of general or localized corrosion and may be accompanied by hydrogen cracking, blistering and ________.

When carbon is absorbed into a material at elevated temperatures while in contact with a carbonaceous substance it is called carburization. Temperatures usually have to be above __________ for this to occur.