MAR Chrome Pro TJC



High Speed Functional Chromium Process

MAR CHROME PRO TJC is a specially formulated High Speed Functional Chromium electroplating process which is fluoride free. The high-speed capabilities are a function of the chemistry design, which allows higher current efficiencies. The system has the capability of processing at much higher current densities as compared to conventional systems, which do not use secondary catalysts. The increase in the deposition rate is a result of the increase in the current efficiency.

The electroplated deposits from the MAR CHROME PRO TJC system exhibit very shiny, bright and smooth surfaces. The micro-hardness of the deposit shows values in the range of 1,000 to 1,500 KHN100 range, with a micro-cracked count in the range of 2,000 to 4,000 cracks per linear inch providing superior corrosion resistance and acid resistance is contributed by the deposition of two metals as alloys. With these characteristics, there is a very noticeable increase in the wear performance of this deposit which is suitable for a high wear and corrosive environment.

The MAR CHROME PRO IA plating system is maintained with a liquid additive which eliminate dusting and splash back from solid additions. The system consistency can be maintained using an amp-hour control system. Standard pre-treatment cycles, anodes and equipment can be used as those in any hexavalent chromium plating systems.

WARRANTY AND DISCLAIMER: This information is based on our experience and is, to the best of our knowledge, true and accurate. MAR-Tech Holdings Inc. gives no warranty, expressed or implied and the products are sold upon condition that the purchasers will make their own tests to determine the quality and suitability of the product. Any information or suggestions are given without warranty of any kind and the purchasers are solely responsible any loss arising from the use of such information.

Recommended Operating Parameters
Chromic Acid 32 oz/USG (240 g/litre)
Sulphate radical 0.36oz/USG (2.70 g/litre)
Ratio 75 – 120
Temperature 130°F – 140°F (55°C – 60°C)
Cathode Current Density Range 2 – 10 ASI (30 – 154 ASD)
Anode Current Density 1 – 5 ASI (15 – 77 ASD)
Plating Rates (approximate) 2 ASI 60°C      1.3 mil/hr
4 ASI 60°C      2.8 mil/hr
6 ASI 60°C      4.5 mil/hr
Plating Solution Make-up and Conversions

Existing Chromium Solution Conversion

Most chromium plating solution can be converted to the MAR CHROME PRO TJC. An analysis of the impurities must be done to determine the level of metallic contamination prior to conversion. Fluoride type of systems can not be converted to the MAR CHROME PRO TJC.

New Plating Solution Make-up

A new make-up can be accomplished by two methods. The use of MAR CHROME PRO TJC MU-L can be used. This liquid contains 480 g/litre of Chromic Acid and the required amount of MAR CHROME PRO TJC catalyst. MAR CHROME PRO TJC MU-S is a solid make-up containing chromic acid and the appropriate catalyst quantity.


  1. For each 100 Litres of plating solution: 50 litres of MAR CHROME PRO TJC MU-L
  2. For each 100 USG of plating solution: 50 USG of MAR CHROME PRO TJC MU-L

Dilute to volume with DI water.

Bring the solution to the correct level with DI Water.

Heat the solution to the operating temperature of 140°F (60°C). At this time analyze the plating solution of sulphate. Add Sulphuric Acid to bring the sulphate content to 0.33oz/USG (2.5 g/l). Electrolyze the plating solution for 5 hours to form equilibrium with all of the components.


The MAR CHROME PRO TJC plating solution can be maintained using the liquid MAR CHROME PRO TJC RL or the solid MAR CHROME PRO TJC RS. Both systems contain Chromic Acid and the secondary catalyst. The sulphate catalyst is maintained by analysis and adjustments are made with Sulphuric Acid or Barium Carbonate.

The liquid MAR CHROME PRO TJC RL contains 450 g/l of Chromic Acid and the secondary catalyst. Additions can be made at a rate of 350 ml per 1,000 amp-hours using an amp-hour controller with a feeder pump.

The solid MAR CHROME PRO TJC RS contains the Chromic Acid and the secondary catalyst and can be added to the plating solution at a rate of 15 KG per 100,000 amp-hours or by analysis of the Chromic Acid in the plating solution.



Steel tanks lined with PVDF, PFA or flexible PVC materials or other materials capable of withstanding the continuous exposure to the high concentration of chromic acid and temperature.


Standard 7% tin – 93% lead anodes should be used. A combination of tin, antimony and lead alloys may be also used. Any auxiliary or conforming anodes must also be of any of the above alloys.


Appropriate rectifiers with less than 5% ripple and sufficient amperage and voltage capacity should be used.


Titanium or TEFLON® covered heaters, heating and cooling coils and heat exchangers can be used. Steel or Stainless Steels must be avoided since they will dissolve in the chromic acid solution.


Ventilation that meets government emission standards should be used. Temperature controls and bus bars used in conventional chromium plating systems can be used. If heating is done using steam and cooling by water, electrically insulate these lines by using rubber connections.


All of the MAR CHROME PRO TJC compounds and the actual plating bath contain Chromic Acid. It can cause severe burns. Avoid contact with eyes, skin, and clothing. Do not inhale or swallow. Eye contact can cause severe burns or loss of sight. Use with adequate ventilation and proper protective equipment. Rubber gloves and chemical safety glasses are recommended safety equipment including NIOSH/MSHA approved respirators should be used, as necessary. Do not eat or drink while handling this product, and wash thoroughly after handling these materials. Consult the individual Material Safety Data Sheets (MSDS) of the MAR CHROME PRO TJC system for complete information.


Eye contact: Flush immediately with a continuous flow of warm water for 15 minutes. Call a physician for treatment for exposure to chromic acid immediately.

Skin contact: Flush thoroughly with water. Contaminated clothing must be removed and washed immediately before reuse. Chromic Acid in contact with organic materials, such as clothing will cause burns.

Inhalation: Remove the exposed patient to fresh air and consult a physician.

Ingestion: HARMFUL IF SWALLOWED. If swallowed, DO NOT INDUCE VOMITING. Give large quantities of water. Never give anything by mouth to an unconscious person. Call a physician for further treatment immediately.


The MAR CHROME PRO TJC liquid is very stable, however, the solid MAR CHROME PRO TJCRS can absorb moisture once the container has been opened. Storage between 10°C and 40°C is preferred. Prolonged storage at low temperature may cause solids to crystallize out of solution. Do not store in contact with organic or alkaline materials. Keep containers closed when not in use. Do not cross contaminate containers, always use clean scoops, buckets, and pumps.


Consult the MSDS’s for the MAR CHROME PRO TJC plating system for complete information.

Always contain the spillage, soak up the solutions with an inert absorbent and never use paper. Scoop into a suitable container for disposal. Refer to the applicable provincial and local regulations for the current response information.

The waste generated from any spill of the MAR CHROME PRO TJC products and the plating solution will contain levels of chromium in excess of permissible limits. Refer to your local and government regulations. These laws and regulations will determine the proper procedure for waste disposal.

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