Common Laboratory Beakers are used for Laboratory plating tests, small batch plating, electrochemical production of organic & inorganic compounds and many. The common beakers are available in the sizes of 0.5, 1.0, 2.0, 3.0 & 5.0 liters by volume. Standard Platinized Titanium Anodes [PTA] and Mixed Metal Oxide coated Anodes [MMOA] are available for said glass beakers. Anodes are available in the form of expanded mesh, with hook, sheet with hook. The substrate of the electrodes are Titanium, Nickel, and Niobium based on the application.

Many article provides a history of platinised anodes by reviewing innovations in the chlor-alkali industry, electroplating, electro galvanizing, electro winning etc.... These anodes are attractive for numerous reasons (e.g., long life and educed energy consumption), but they must still overcome the hurdle of cost to gain wider acceptance for applications in the various process industries.

Chemical Behavior of Platinum and Titanium:

Platinum is preferred on an anode's outer surface because it is highly resistant to corrosion and can ensure current flow in most electrolyte media without leading to the formation of an insulating layer on itself. Because it doesn’t corrode, it doesn’t produce corrosion products and hence the consumption rate is very low.

Platinum is inert in fused salts and acids, whereas it is dissolved in aqua region. There is no risk of hydrogen embrittlement. It is one of the few rare metals that perfectly resist chlorides of seawater.

Titanium shows reasonably good resistance to a marine environment (seawater in particular). It does not react with concentrated (80%) solutions of metallic chlorides. However, it is susceptible to attack by hydrofluoric acid (HF) and hot hydrochloric acid (HCl) of higher concentrations. Even hydrogen peroxide and hot nitric acid can attack titanium. Oxidizing agents normally do not attack titanium because it readily forms a protective oxide coating. However, non-oxidizing substances such as sulfuric acid (above 5% concentration) and phosphoric acid (above 30%) can attack titanium. From a hydrogen embrittlement point of view, titanium fares better than tantalum as an anode material.

Properties of platinum Plating:

Softness, Good adhesion, High plasticity, High ductility, High Purity

Configuration of Anode and Cathode:

The negative (-) cable is connected to the item to be plated, the cathode. The Positive (+) lead is connected to the solution electrode, the anode. In this configuration the piece being plated should be rotated occasionally since the deposition rate may be greater on the areas that are facing the anode and less on the side opposite the anode.

Common Advantages of the Beaker / Laboratory Anodes:
  •  Simplified handling
  •  Optimum anode surface
  •  Long lifetime
  •  Stability in the beaker
  •  Simple set-up
  •  No complicated wiring
  •  Replaceable anode segments