Cell Plate passivation of stainless steel

Cell plates need to be passivated prior to use.
The process used to be done with nitric acid, which is dangerous and also have an environmental problem of what to do with the acid when finished. Nitric acid can burn your skin severely, and also can damage many things around it by just the fumes that come off it.

Today the favoured method of passivation is to use citric acid which is safe, governmentally friendly and cheap.

Citric acid can be sent through the post as it is a "Non Dangerous Goods" category,

The process is very simple, mix the citric acid power in some distilled water (3% solution) and warm to about 50C or 120F. I use an aquarium pump to pump the acid through a dry cell after it has been assembled, and any number of cells can be joined together so that all can be done at the same time.
Let the pump work for about 30 minutes and then drain and blow air through the cells or better still, oxygen.

Cells are now ready for putting into service.

If anyone needs citric acid, we have supplies available on our website in small packets.

Category:

Autos & Vehicles

Tags:

• citric
• acid
• passivate
• stainless
• steel
• hho
• hydrogen
• hydroxy

[regpye]

When stainless steel is used in a cell, any work that has been performed using any machinery or handling that contains steel or iron will contaminate the surface of the stainless. Passivation removes any traces of iron on the surface that could start rust and become like a cancer to the stainless. Nitric acid was once widely used for passiavtion, but it is a dangerous and has end products that are difficult to get rid of. Citric acid which is safer is now the favoured method.

[NOBOX7]

what does this do