CHROME PLATING

GMA MACHINERY ENTERPRISES (GMA) introduces the newest electroplating equipment and techniques, providing integrated services of hard chrome plating, surface grinder and sophisticated polishing, improving quality and evenness of plating, to enhance customer’s product competitiveness. Furthermore, 2 sets of electroplating equipment were established in 2018 and 2019, techniques are kept leveling up by continuous researching and developing. At present, the longest length of plating is 6-meter, width is 1-meter and thickness achieves 150um.

Industrial hard chrome plating process is the technique GMA applies, a very important process in precision industry. Accompanied with Japanese electroplating solution and heating up process, surface hardness of hard chrome electroplated item would achieve HRC 65 degree (800HV) at lowest, which is superior to market standard. By having characteristics of abrasion resistance, corrosion resistance and alkali resistance, a normal rasp would not damage its surface, scratches would never be found. Although the cost of plating is high, it can keep molds’ surface perfect and perform the best, extending service life of the molds.

GMA aims for “Sustainable,” paying all our efforts on environmentally sustainable working. Not only does GMA establishes systems for disposal of sewage and polluted air, but also requires all the process meet the regulations of GREEN and follows 6S production management to fit highest standard of environment-friendly. GMA offers highly precision quality of products and stable supply-chain, holding the spirit of feedback to the society, and settling our business’s foundation down for “Sustainable.”

ELECTROPLATING EQUIPMENT

Type of Trough

Vertical

Vertical

Horizontal

Horizontal

Volume CBM(Width*Length*Depth)

1.5*1*3

1.5*1.5*6

4*1*1

4.2*1*2

Pinhole

Good

Good

 

 

R Angle

Good

 

 

 

Effective Depth

 

Good

 

 

Plating Inside The Hole

 

 

Good

Good

Evenness of Plating Layer

 

Good

Good

  • Equipment for Disposal of Sewage

  • Equipment for Polluted Air

  • Equipment for Pure Water

CERTIFICATES

  • ISO 9001 Certificate of Water Pollution Prevention

  • Approval for Toxic Chemicals

MUST KNOW ABOUT ELECTROPLATING

DEFINITION

Two Concepts:

Narrow Sense:

Metal Ion, composed in plating liquid, under the function of direct current field, is transferred because of diffusion, convection and magnetic field migration, to acquire electron on Cathode for returning to Metal Electron, and doing crystalline orientation into Metal Layer. The process is called Electroplating.

Broadly Speaking:

Most types of electroplating process accepted by major suppliers are composed by Electrodeposition, Electroless deposition, conversion coating and processing of surface treatment which includes Cleaning, Smoothing, Glossy and Micro-roughening.

PURPOSE

Plating metal layer on designated items give the material smoothness, rust prevention and abrasion resistance.

DOES ELECTROPLATING COVER SCRATCHES?

Electroplating is just applying a metal layer on its surface, grinding after plating to rebuild mirror surface is recommended when the thickness is under 10um; while weld repairing and regrinding after plating to rebuild mirror surface is concerned by circumstances when the thickness is over 10um.

WHY SAY 30% ELECTROPLATING, 70% PRE-TREATMENT ?

Cleaning of the electroplated item and control of the solutions are necessary steps before Electroplating, this is the knowledge everyone has; however, how important pre-treatment is in all plating procedures? Most people are not sure about this. In the past experiences, disqualified pre-treatment contains 70%~80% of all failed plating attempts, experts can conclude the level of techniques and management of the designated factory just from pre-treatment. GMA applies multi runners cleaning, demagnetization and control of solution ingredients for the electroplated items. Accordingly, only if pre-treatment is processed well, we can make sure the plating runs smoothly to reduce seconds and defective products, so that production efficiency will be improved and cost can be reduced.

COMPARISON between TRIVALENT CHROMIUM PLATING and HEXAVALENT CHROMIUM PLATING

CHARACTERISTICS

HEXAVALENT CHROMIUM PLATING

TRIVALENT CHROMIUM

Contains of Chrome (g/L)

 25~300

15~20

 Density of Cathode Current (a/dm²)

15~30 

3~15 

 Cathode Current Effectiveness (%)

10~16

>30 

ION Dispersing Ability

Bad 

Good

Thickness of Plating Layer

 Available to plate thicker

Difficult to plate thicker

Stableness of Plating Liquid

Good

Worse 

Hardness of Plating Liquid

 High,
Abrasion Resistance

Low

Gloss of Plating Liquid

 Glossy, Adjustable

Similar to color of Stainless Steel

 Chrome Mist

Yes

No

 Toxic

Strong

Weaker