So how am I going to run this blog? We'll I imagine this will be an on going project. This blog will be devoted to an experiment which I will document photographically on regular intervals. I will continue documenting this experiment until I am satisfied I have given the technology an adequate chance to prove or disprove itself.
Very basically, Rust is caused when iron reacts with oxygen to form a layer of Iron oxide crystals. This from the Rust WIKI "
The rusting of iron is an electrochemical process that begins with the transfer of electrons from iron to oxygen. The rate of corrosion is affected by water and accelerated by electrolytes, as illustrated by the effects of road salt on the corrosion of automobiles. The key reaction is the reduction of oxygen:
O2 + 4 e- + 2 H2O → 4 OH-
Because it forms hydroxide ions, this process is strongly affected by the presence of acid. Indeed, the corrosion of most metals by oxygen is accelerated at low pH. Providing the electrons for the above reaction is the oxidation of iron that may be described as follows:
Fe → Fe2+ + 2 e−
The following redox reaction also occurs in the presence of water and is crucial to the formation of rust:
4 Fe2+ + O2 → 4 Fe3+ + 2 O2−[]
Additionally, the following multistep acid-base reactions affect the course of rust formation:
Fe2+ + 2 H2O ⇌ Fe(OH)2 + 2 H+
Fe3+ + 3 H2O ⇌ Fe(OH)3 + 3 H+
as do the following dehydration equilibria:
Fe(OH)2 ⇌ FeO + H2O
Fe(OH)3 ⇌ FeO(OH) + H2O
2 FeO(OH) ⇌ Fe2O3 + H2O
From the above equations, it is also seen that the corrosion products are dictated by the availability of water and oxygen. With limited dissolved oxygen, iron(II)-containing materials are favoured, including FeO and black lodestone (Fe3O4). High oxygen concentrations favour ferric materials with the nominal formulae Fe(OH)3-xOx/2. The nature of rust changes with time, reflecting the slow rates of the reactions of solids.
Furthermore, these complex processes are affected by the presence of other ions, such as Ca2+, which both serve as an electrolyte, and thus accelerate rust formation, or combine with the hydroxides and oxides of iron to precipitate a variety of Ca-Fe-O-OH species."
So how does Electronic Rust Protection Work?
I really did try to find a single consensus on how these things are supposed to work. I read all sorts of stories about how they turn cars into capacitors, tricking nature, blasting with electrons at high voltage etc. etc. Basically the general consensus is they turn your car into a capacitor and somehow this is supposed to retard rust. If you're after a more scientific explanation, you won't get one here. I seriously doubt anyone knows how these things actually work which has lead me and I’m sure many others to be sceptical about the technology.
2x Cast Iron Pans
1x Car Battery
1x 0 gauge earth wire
1x Glotech Electronic Rust Prevention unit.
1x Bag of Sea Salt
1x Dishwashing powder
2x cotton cloths
Cast Iron is incredibly prone to rust. Installing a Rust protection Coupler device to one of the cast iron pans should minimize rust from "growing" on the pan.
1) Take 2 cast iron pans. Clean the pans thoroughly with wire brush to remove any surface protectant (conditioner) from both pans.
2) Place pans in dishwasher and run through full cycle with dishwashing powder to remove any excess protectant from pans.
3) Remove rust from both pans after dishwashing with wire brush.
4)Rinse and dry both pans thoroughly with cotton cloth (new cloth for each pan)
5)Bathe both units pans in a saturated solution of salt water (More salt than will dissolve in the water).
6)Install Glotech rust protection device to one of the pans (Pan A).
7) Connect earth wire from negative pole of car battery to Pan A. This should simulate the way a car battery is connected to the chassis of a car.
8)Leave Pan B without any rust protection device or negative earth.
9) Move both devices to a cool environment.
10) Observe results, take photographs of changes to both pans and compare results over time.
Day 1) Rust is evident on both pans. However the Pan B appears to have a higher concentration of rust. See images below.
Again observed rust on both pans, again Pan B appears to have less rust evident. Pan A appears to have an area on top of which no rust is evident. Pan A also appears to have less rust evident on sides. See pictures below.
Rust beginning to cake on Pan B, rust pitting observed as well as large rust crystals on Pan B. Rust is sparser and more dappled on Pan A.
Further rust caking and crystallisation apparent on Pan B. Pan A appears to have thinner, more localized rust to certain locations around pan. See images for comparison of areas on both pans which display evidence of most significant rust.
Further, notice the "Rim" of pan a exhibits no or very little rust, while the rim of Pan B is completely covered. Also notice a large crystal of rust on Pan B in the centre of the first image.
Summary - Disclaimer
While I attempted to create the most uniform conditions possible in this experiment, certain factors were beyond my control. For instance I do not know if the Iron content in each subject was the same. I'd be surprised if although "cast iron", these pans are made up of other metals, the quantity of various metals in each possibly being different. Both pans were purchased at the same time however so I would assume they are of the same batch. Experiment was conducted over a period of 4 days. The experiment was conducted in my laundry. I instructed my partner to close the door of the laundry and to use the dryer as much as possible over this period to steam the environment up in order to create a more rust contusive environment. I can confirm the environment was very humid while wet clothes were being dried. This occurred twice daily (I have 2 baby daughters).
There is no doubt the Electronic rust protection system was effective in minimizing the rust on Pan A. Although pan A did rust significantly, this occurred at around half the speed of Pan B. I also noticed that Pan A did not rust as heavily as on Pan B where some caking and crystallization was evident towards the end of the experiment. A number of factors could be improved upon in the experiment. Firstly, pans are not cars. Secondly a controlled environment would not doubt help improve the accuracy of this test. Also the manufacturer claims the paint on a car acts as a dielectric which is supposed to create the capacitive coupler effect. My pans had no paint what so ever. Over the next month or so, I will have the pans painted as does a car and score the paint to simulate a scratch in car paint and re-test. Initial results however definitely favour the Electronic Rust Protection technology.