Exam 1: Corrosion and Materials

Which of the following alkanolamine systems is the least aggressive in causing amine corrosion?

__________ is a change in the microstructure of certain carbon steels and 0.5 Mo steels after long term operation in the 800º F to 1100º F range.

The loss in strength from spheroidization (Softening) is usually accompanied by a(n) _________ in ductility, which allows for deformation at stress concentrations.

Sulfide stress cracking (SSC) is defined as cracking of metal under the combined action of tensile stress and corrosion in the presence of _________ and _________.

Cracks that are typically straight, non-branching, and devoid of any associated plastic deformation are likely associated with which type of failure?

Amine stress corrosion cracking is a term applied to the cracking of steels under the combined actions of ________ and __________ in aqueous alkanolamine systems used to remove/absorb H₂S and/or CO₂ and their mixtures from various gas and liquid hydrocarbon streams.

The signature mark of a fatigue failure is a _______ type fingerprint that has concentric rings.

A form of corrosion caused by living organisms such as bacteria, algae or fungi is _______ .

In order for PASCC to occur the material must be ______.

_________ is a change in the microstructure of certain carbon steels and 0.5Mo steels after long-term operation in the 800º F to 1100º F range that may cause a loss in strength, ductility and/or creep resistance.

Which of the following materials is not susceptible to SCC?

The dewpoint of hydrochloric acid depends on the concentration of hydrogen chloride. It is typically about _________.

________ is a form of erosion caused by the formation and instantaneous collapse of innumerable tiny vapor bubbles.

_________ corrosion rates are found in a gas oil desulfurizers and hydrocrackers than naphtha desulfurizers and hydrocrackers by a factor of almost "2".

Soil corrosion of carbon steel can be minimized through the use of special backfill, coatings and _______.

What is the chemical symbol for butane of butylenes?

Components that have been carburized may have a change in the level of ________.

High temperature H₂ / H₂S corrosion damage is minimized by using alloys with high _________ content.

Cracks connecting hydrogen blisters are referred to as ________.

Steel cleanliness and _______ have a significant influence on toughness and resistance to brittle fracture.