Answer :
Final answer:
The correct answer is D. 200º F. SCC, or stress corrosion cracking, usually occurs at metal temperatures above 200º F.
Explanation:
The correct answer is D. 200º F. SCC, or stress corrosion cracking, is a type of corrosion that occurs when a metal is exposed to both a corrosive environment and tensile stress. The temperature at which SCC typically occurs depends on the specific metal and environment.
In the case of chloride stress corrosion cracking (Cl SCC), which is caused by the presence of chloride ions, it usually occurs at metal temperatures above 200º F. This means that at temperatures below 200º F, the risk of Cl SCC is generally lower.
It's important to note that the temperature at which SCC occurs can vary for different metals and environments, so it's always recommended to consult specific literature or experts for accurate information on SCC susceptibility.
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