Yeah, that's the basic theory. But I've also seen military research indicating chrome-plating didn't significantly retard the erosion of the steel UNDER the chrome. My limited experience with a few chrome-lined barrels tends to agree with this.

My own 26 Nosler Model 48 doesn't show much throat erosion after around 250 rounds, and the Pac-Nor barrel is not chrome-lined.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck