A piston is a component of reciprocating engines, reciprocating pumps, gas compressors and pneumatic cylinders, among other similar mechanisms. It is the moving component that is contained by a cylinder and is made gas-tight by piston rings. In an engine, its purpose is to transfer force from expanding gas in the cylinder to the crankshaft via a piston rod and/or connecting rod. In a pump, the function is reversed and force is transferred from the crankshaft to the piston for the purpose of compressing or ejecting the fluid in the cylinder. In some engines, the piston also acts as a valve by covering and uncovering ports in the cylinder wall.We offer all chinese scooter brand engine piston and piston kits. BAOTIAN, BENZHOU, QINGQI,JONWAY, ZNEN,LONGJIA scooter model piston kits. PIAGGIO CIAO, TYPHOON, LUDIX. Jonway Scooter Piston Kit,GY6 150 Piston Kit,GY6 50 Piston Kit SONORA MOTOR COMPANY , https://www.sonoramotor.com
[ Method 2] Sand blasting or sanding cloth is roughened and then degreased.
[ Method 3] in the following solution at 25
[ Method 4] in the following solution at 60
[ Method 5] in the following solution at 25
[ Method 6] In the following solution 25
[ Method 7] After degreasing, it was etched in the following solution for 10 min , temperature 66
[ Method 8] Oxidation in the following solution: potassium persulfate 1.5 sodium hydroxide 5 water 100 at 60
[ Method 1] Common solvents for degreasing: trichloroethylene, acetone, methyl ethyl ketone, ethyl acetate. -30 °C Immersion for 1 min ; concentrated sulfuric acid 8 concentrated nitric acid  25 water  17 then washed, at 50 -60 °C Dry down. -70 °C Immersion for 10 min : concentrated sulfuric acid  40 4.5 Water 38 Iron sulfate is then washed with water, 60 -70 °C Dry down. -30 °C Under immersion for 10-15 min : concentrated sulfuric acid  10 Cr 5 weight aqueous sodium  85 then washed with water and dried at room temperature. -30 °C Immersion for 1-2 min: ferric chloride 15 concentrated nitric acid  30 water  200 was then washed with water and dried at room temperature. -71 °C : iron sulfate 4.5 concentrated sulfuric acid 3.4 water 450 then in 20 ° C Wash in cold water for 5 min , then dip in the following solution: sodium dichromate 5 concentrated sulfuric acid 10 water 85 and then washed in cold water, immersed in ammonium hydroxide ( d = 0.85 ) for 10 min , then washed with cold water for 5 min, distilled water Net, in 40 ° C Dry down. This method is used brass and bronze process. -70 °C After immersing for 15-20 minutes , the surface is black, and it is wiped once with carbon tetrachloride before bonding. This method is used for copper foil processing.