This corrosion requires two dissimilar metals in electrical contact and in an electrolytic solution.
What is Galvanic Corrosion?
100
These are the 3 main constituents of stainless steel
What are Iron, Chromium, and Carbon?
100
Impressed current and passive anodes are types of this protection for metal.
What is cathodic protection?
100
Metals can be describe using these properties.
What are ductility, strength, malleable, thermal and electrical conductivity, corrosion resistance, opaque, lustrous, reactivity in a corrosive environment?
100
This corrosion causes surface layers to be converted to corrosion products and uniformly decrease the thickness of the metal.
What is uniform corrosion?
200
This corrosion requires a low oxygen environment with high system flow rates where the corrosion layer is stripped off and replaced with a new corrosion layer.
What is Flow Accelerated Corrosion.
200
This is why Chromium is added to metal.
What is to increase the corrosion resistance property of a metal?
200
In order to turn the chemical environment in the reactor to a reducing environment, this chemical is added to remove dissolved oxygen.
What is Hydrogen?
200
The Law of Electroneutrality states that these must be equal in a neutral substance.
What are the number of positive and negative ions?
200
This corrosion is a sub surface attack that breaks the grains of the metal.
What is transgranular corrosion?
300
This Corrosion takes is a localized attack at the grain boundary.
What is intergranular corrosion?
300
A Zirconium Alloy used at the Perry Nuclear Power Plant can be found in which component?
What is the fuel cladding.
300
These conditions in the Circ Water system requires the addition of chemicals to ensure system health.
What is microbiological fouling, corrosion, and scaling?
300
These tests are general indication of ion exchanger performance.
What are silica and conductivity?
300
This type of corrosion is the biggest concern at the Perry Nuclear Power Plant.
What is IGSCC?
400
This corrosion is a localized attack of metal that penetrates the metal 90 degrees to the surface in a rapid manner.
What is pitting corrosion?
400
This additive to stainless steel improves corrosion resistance of the metal by forming a tough adherent corrosion resistant oxide film on the metal surface.
What is Chromium?
400
When there is a sudden reduction in the remaining residual chlorine levels, this has been achieved.
What is break point chlorination?
400
In metal, these electrons are free to move about and lead to good electrical conductivity of metal.
What are valence electrons?
400
This corrosion is where a metal of an alloy "leaches" out of the alloy solution with no indication of pits or cracks.
What is Selective Dissolution?
500
This corrosion occurs in gap/cracks a few microns thick, generally where to surfaces meet and starts due to the depletion of oxygen.
What is crevice corrosion?
500
Inconel contains this element to help minimized stress corrosion cracking.
What is Nickel?
500
This type of Zinc is added to the reactor via the feedwater system, due to it containing <1% of Zn-64.
What is depleted Zinc Oxide?
500
When resin removes a cation, this ion is released into the system fluid.
What is hydrogen?
500
These are the differences between uniform and localized corrosions.
What are Uniform corrosion is a an attack of a large surface area and is slow. Localized corrosion is a selective attack on a small area and can cause a rapid failure of the metal.