．Combination between alloy aluminum cylinder and plating layer

● destructive inspection of
nikasil cylinder
● destructive inspection of
chromium plated cylinder

　　The plating layer may easily crack and blister to obstacle the normal operation of cylinder when the combination is weakened due to the stress difference between alloy aluminum cylinder and plating layer on account of cylinder temperature dramatically changed with the expansion factor of aluminum larger than plating layer under engine high speed operation
　　Thus, the alloy aluminum chromium plated cylinder or alloy aluminum nikasil coating cylinder of “SHINHER POWER” should completely comply:

  • ■ The coating layer should not have any crack, peer, and
    　 blister after 1 hour in steady temperature 300±10 T℃
    　 and then placed in air to cool down to room temperature.

  • ■ The coating layer should not have any crack, peer, and
    　 blister after 5 minutes in steady temperature 220±10 T℃
    　 and then placed in 5 T℃ cold water quickly.


    ■ No peer or apart of coating layer should be found at the
    　 combination edge sawed by saw blade in the destructive

    　 inspection.