Kev kho deg yog ib txoj hauv kev tsim cov txheej txheej saum npoo nrog cov khoom siv sib txawv, lub cev thiab tshuaj lom neeg los ntawm cov txheej txheem ntawm lub substrate, yog los ntxuav, cheb, deburr, degrease, thiab descale lub workpiece nto.
Lub hom phiaj ntawm kev kho saum npoo yog ua kom tau raws li qhov kev tiv thaiv corrosion, hnav tsis kam, kho kom zoo nkauj lossis lwm yam kev ua haujlwm tshwj xeeb ntawm cov khoom thiab rau cov khoom siv machined.