Trademarked by Chromium Corporation in the 1930's, the CRODON^® plating process is still recognized as the leader in surface technology in the 21st century. CRODON^® lining resists wear to cylinder bores better than any other material available today.

Wear to the cylinder bore is a function of the following five variables:

Hardness:

CRODON^® lining is the hardest available material appropriate for cylinder bores. (Please refer to the graph below illustrating Rockwell "C" hardness) With a Rockwell "C" scale hardness of 70 - 72 (compared to a Rockwell hardness of 62 - 67 for conventional chrome plating), CRODON^® lining provides superior resistance to sliding wear, abrasion, scuffing and scoring.

Corrosion:

CRODON^® lining is not affected by most corrosive elements. It resists corrosion due to water, sulfuric acid and hydrogen sulfide, the most common contaminants affecting engine operation. CRODON^® enhances this natural advantage by forming an extremely dense, fine grain plate that prevents infiltration to the base metal. CRODON^® protects cylinders with a superior surface that easily withstands hostile environments.

Coefficient of Friction:

CRODON^® has the lowest coefficient of friction of materials suitable for cylinders. CRODON^® requires only one-third less energy than steel to slide over a cast iron surface. Eighty percent of sliding wear occurs during startup and coefficient of friction is the primary factor. CRODON'S^® low coefficient of friction saves cylinders from wear, galling and seizing throughout their life cycle.

Thermal Stability:

CRODON^® is virtually impervious to thermal degradation due to two inherent strengths: its extreme melting point and its thermal conductivity. The extremely high melting point (3275°F) will cause the base metal to fail before CRODON^® will. CRODON's thermal conductivity (0.65 cal/cm²) is just below that of gold. Its high thermal conductivity ensures that heat is quickly passed to the base metal and cooling system while maintaining even heat distribution over the entire cylinder surface. CRODON^® chrome plate acts as a counter force to any cylinder tendency to develop destructive hot spots.

Liner Finish:

Chromium Corporation has continuously engineered new cylinder finishes to optimize specific engine performance. In addition to the MicroProfile™ finish for cast liners, there are currently five types of CRODON^® lined mechanically induced finishes provided to Chromium Corporation's power cylinder customers.

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