How does Evapo-Rust™ work?

Evapo-Rust™ uses “selective chelation”, a process in which a large synthetic molecule forms a bond with metals and holds them in solution.  The active ingredient in Evapo-Rust™ bonds exclusively to the iron in iron oxide - not in steel.

Is Evapo-Rust NZFSA Approved?

Yes Evapo-Rust™, Rust Remover and Aluminate are approved for code C23 and Cooling System Flush is approved for code C62. 

Do parts have to be completely clean before treatment?

No Evapo-Rust™ contains detergents which can penetrate dirt and oil.  Still, surface contaminants can slow the process and shorten the life of Evapo-Rust™.  Heavy greases and cosmoline should be removed prior to de-rusting.

 

Will Evapo-Rust™ remove bluing and other oxide finishes?

Yes, in about 30 minutes.  Anodizing will not be removed.  Powder coating and paints that do not contain oxides won’t be removed.

 

Can I clean Brass, copper and aluminum with Evapo-Rust™?

No, it will not clean (or damage) any of these metals.  It will not harm plastic, clothing or glass either.

 

I get a black film on some parts after using Evapo-Rust™.  What is it and how do I remove it?

High carbon steel and tool alloy steel items will have a darker appearance when de-rusted.  The dark film is carbon, and can be easily wiped off with a cloth.

 

Can I de-rust by spraying Evapo-Rust™ on the rusted area?

No, Evapo-Rust™ only works in liquid form, since the water in the solution will evaporate when sprayed.  However, it can be sprayed on unrusted steel as a rust preventative.

 

How do I know when the bath is spent?

The bath will turn completely black and will not remove rust.

 

Is Evapo-Rust™ safe to transport?

Yes Evapo-Rust is non-hazardous and can be shipped by regular courier freight services.

 

What is the shelf life of Evapo-Rust™ and how long does it last?

Evapo-Rust™ has an indefinite shelf life and can be used over and over until it absolutely stops working.  Only water may be lost to evaporation.  If any of the bath evaporates, simply replace it with fresh tap water.  Evapo-Rust™ has a tremendous work load.  20 litres can remove 1 kilo of pure dry rust.  Rust is about 1/17 the weight of iron by volume, which means its workload is substantial.  On average, 20 litres will de-rust up to 1/2 tonne of light to moderately rusty steel.    As the iron is removed from the iron oxide, carbon from the rust is released.  Some parts may have a black film after using Evapo-Rust™  the black is carbon from the steel.  Generally high carbon steel is used in making items that are flexible (eg. Springs, saw blades, etc).  High carbon steel and tool alloy steel items, when de-rusted, will have a darker appearance.  The carbon can be removed simply by wiping with a cloth when rinsing with water.  Eventually, the bath will turn completely black and will not perform.  The more you de-rust, the darker the solution becomes.  Evapo-Rust™ is spent when it is pitch black and no longer performs.

I left Evapo-Rust uncovered and found a dark gel left in container:

The water content in Evapo-Rust is the only thing that will evaporate.  If the water content is replaced to bring the content back to the capacity of the original container purchased Evapo-Rust will be revitalized. It is suggested that when using Evapo-Rust mark the top of fluid level in container before use and maintain this level by continual top up with fresh water to circumvent evaporation.