53. Yuav ua li cas rau lub sij hawm qhuav qhuav rau cov kav hlau steel?

Thaum cov kuab tshuaj-coated steel kav tau ziab hauv lub qhov cub kom qhuav, qhov ntev ntev ntawm qhov kub thiab txias tuaj yeem ua rau ob qho teeb meem tseem ceeb. Kev ziab ntau dhau ntawm qhov kub thiab txias ua rau hnyav dhau - ziab, ua rau cov nplaim hluav taws kub thiab daj daj uas cuam tshuam rau kev ua haujlwm ntawm plating thiab ua rau to. Conversely, lub sij hawm kom qhuav nyob rau hauv qis kub tiv thaiv sai evaporation ntawm hnyav ya raws. Thaum noo noo accumulates nyob rau hauv cov yeeb nkab kawg qhov, nws concentrates nyob rau hauv lub puab phab ntsa, diluting cov kuab tshuaj muaj pes tsawg leeg thiab tsim zoo tagnrho tej yam kev mob rau oxidation. Qhov no ua rau kom xau ntawm qhov kawg qhov thiab "sparking" phenomena thaum plating.