The metal substrate prepared in step is immersed in the slurry and subjected to cathodic polarization at a voltage of 100 400 V, thereby {HEAD ~ glass particles} are deposited on {TAIL ~ the metal substrate surface} 
The metal substrate prepared in step is immersed in the slurry and subjected to cathodic polarization at a voltage of 100 400 V , thereby { HEAD ~ glass particles } are deposited on { TAIL ~ the metal substrate surface }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL