Corten accelerated aging

raw blue unaged corten steel

Corten steel is delivered unweathered

corten half round planter

No steel manufacturer suggests that you apply caustic chemicals to their steel

Beware of fake internet gurus
Speeding up the initial aging of corten steel, may reduce the long term life span of the steel
As the steel develops its protective coating of repeated wet/dry cycles, this process can take a year or more

terraced corten reatining wall

Would you wash you car with a caustic chemicals?

The result would be reduced lifespan.