of 50 g l and 2 g l respectively was prepared and the laser beam was directed onto a stainless steel substrate under conditions similar to those of example 4 whereby a ceramic coating was formed at the speed of 0 2 u03bcm sec and epma analysis revealed that na si pb and o were present in the coating an aqueous solution containing na 2 o sio 2 5h 2 o pbo naalo 3 and naoh in amounts of 30 g l 1 g l 2 g l and 1 g l respectively was prepared and the laser beam was directed onto an iron substrate under conditions similar to those of example 4 whereby a ceramic coating was formed at the speed of 0 5 u03bcm sec and epma analysis revealed that na si pb al and o were present in the coating an aqueous solution containing colloidal silica and acetic acid in amounts of 100 g l and 30 g l respectively was prepared and a laser beam was directed onto a stainless steel substrate under conditions similar to those of example 4 whereby a ceramic coating was formed at the speed of 0 2 u03bcm sec and epma analysis revealed that si and o were present in the coating this example was carried out by the same method as example 4 except that the temperature of the.