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36 Cards in this Set
- Front
- Back
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How conditions must exist for metal corrosion to occur?
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Four
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What is the most common type of corrosion?
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Uniform Surface corrosion
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This occurs when different metals are in contact with each other?
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Galvanic Corrosion
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What corrosion is extremely localized attack that results in holes in the metal?
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Pitting Corrosion
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What corrosion attacks the grain boundaries of the metal?
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Intergranular Corrosion
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What corrosion is an advance fom of intergranular corrosion?
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Exfoliation Corrosion
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What corrosion can occur when stagnant solution has pooled?
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Crevice Corrosion.
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What corrosion forms wormlike traces beneath the surface?
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Filiform Corrosion
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What corrosion is the increase in the rate of attack on a metal due to corrosive fluid on surface?
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Erosion Corrosion
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The intergranular or transgranular cracking of metal caused by tensile stress and corrosion.
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Stress Corrosion
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The cracking of metals caused by the combined effects of cyclic stress and corrosion.
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Corrosion Fatique
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What corrosion occurs at the contact areas between materials under load subject to repeated vibration.
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Fretting Corrosion
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What does the corrosion product of aluminum alloy look like?
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White to gray powder
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What does the corrosion product of magnesium alloy look like?
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Whate, powdery, snowlike mounds, and white spots on surface
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What does the corrosion product of carbon & low alloy steel look like?
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Reddish-brown oxide (rust)
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What does the corrosion product of Stainless Steels look like?
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Rough surface; sometimes a red, brown, or black stain
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What does the corrosion product of Titanium Alloy look like?
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No visisble corrosion. Colored surface oxides develop over 700 degree F
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What does the corrosion product of Cadmium look like?
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From white powdery deposit to brown to black mottling of the surface
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What does the corrosion product of Nickel-base Alloy (Inconel, Monel) look like?
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Green powdery deposit
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What does the corrosion product of Copper-base Alloy, Brass, Bronze look like?
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Blue or green powdery deposit
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What does the corrosion product of SIlver look like?
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Brown to black film
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What does the corrosion product of Gold look like?
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Deposits cause darkening of reflective surfaces
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What does the corrosion product of Tin look like?
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Whisker-like deposits
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What type of corrosion is Aluminum Alloy susceptible to?
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Surface pitting, intergranular, exfoliation, stress corrosion and fatigue cracking, and fretting.
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What type of corrosion is Magnesium Alloy susceptible to?
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High susceptible to pitting
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What type of corrosion is Carbon and Low Alloy Steel susceptible to?
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Surface oxidation and pitting; surface and intergranular corrosion
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What type of corrosion is Stainless steel susceptible to?
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crevice corrosion
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What type of corrosion is Titanium Alloy susceptible to?
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Titanium is highly corrosion resistant
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What type of corrosion is Cadmium sussceptible to?
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Uniform surface corrosion?
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What type of corrosion is Chromium susceptible to?
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Pitting
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What type of corrosion is Nickel-base Alloy susceptible to?
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Generally good corrosion resistant; susceptible to pitting in sea water.
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What type of corrosion is Electroless Nickel susceptible to?
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Pitting and flaking of surface plating
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What type of corrosion are Copper-base Alloy, Brass, and Bronze susceptible to?
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Surface and intergranular corrosion
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What type of corrosion is Silver susceptible to?
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Will tarnish in presence of sulfur
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What type of corrosion is Gold susceptible to?
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Highly corrosion resistant
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What type of corrosion is Tin susceptible to?
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Subject to Whisker growth
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