Answer:
The Civil War would have likely occurred even if the Corwin Amendment had been passed, probably a few years later though.
Step-by-step explanation:
The Corwin Amendment proposed shielding slavery from the Power of the Federal Government to prohibit it.
This Amendment was obviously supported by the Southern Slave states, while the Northern free states opposed it.
Even if this admendment had been passed, the Civil War would have likely occurred anyway. The reason is that slavery was an extremely polarizing topic at the time, with people either in favor or in opposition to it, willing to go to war to defend their position.