At STYM, we use hard-chrome plating process to deposit chrome on the stem of the valve in order to add its durability and wear resistance. Through careful and cautious design of our chrome plating plant, and regular monitoring of the plating process and chemical balancing, we are able to produce high quality chrome plated engine valves efficiently and in high volumes.Since it is our goal to see that quality parts are consistently produced, we established qualitative methods for defining the acceptability of each plated part, as well as the sampling frequency of production parts, and the test methods used on the samples in order to determine qualification of the parts. Compliance with these quality specifications ensure that we are following good electroplating practices.

Several factors are used to determine the acceptability of plated parts including finish, micro-hardness, and adhesion.The surface finish of a plated part is a result of many variables including the current density, voltage, substrate material, surface preparation, chemical composition, temperature, and contaminant levels of the solution.The micro-hardness is an excellent indication of the overall plating process and may be affected by factors such as the current density, voltage, temperature, and chemical composition of the solution.

The adhesion of chrome plating to the substrate material is directly related to surface preparation.we removes surface contaminants prior to plating through baking, and pre-grinding. Plated parts are then subjected to steel shot blasting prior to adhesion inspection.So overall our hard chrome plating process gives the Stem of the Valve added durability by depositing chrome on the stem which the thickness of minimum 5 microns, that results in good compatibility for the valves made with DIN. 14882 (Stainless) which are going to be used in a cast iron guides.