Since the idea that the metal might be a risk factor for Alzheimer's disease was first proposed there have been numerous conferences on aluminium and health. The medical research community, international and government regulatory agencies and the aluminium industry all review the evidence at frequent intervals. The overwhelming medical and scientific opinion is that the findings .... do not convincingly demonstrate a causal relationship between aluminium and Alzheimer's disease, and that no useful medical or public health recommendations can be made − at least at present (Massey and Taylor 1989).
Magnesium is not "softer" than steel, as someone mentioned. It is at the bottom of the activity series, also called the nobility series, of metals. When an electrolyte ( water) allows current to flow between two different metals, the less noble metal will be corroded, or sacrificed, to protect the more noble metal. The anode is also referred to as a sacrificial anode. Zinc anode blocks are used widely in the maritime arena, including the navy, to protect hull and tank structures.
Something about a reaction of magnesium with something in well water can cause the odor.
Love the USA, I am guessing they use the magnesium over aluminum due to aluminum being lower on that scale, meaning it deteriorates faster than magnesium? I should look into swapping in an aluminium rod, my well water from time to time stinks pretty bad.
Yea I have one on order right now to switch out in a B/W water heater, should be here tomorrow. About 36 bucks for the new aluminum rod, I hope it works for my customer. Their well water on the hot side just friken stinks bad but not on the cold. It's not a recall, they will pay for a service call and the rod and with no guarantee but I don't know what else to try. I'll let everyone know how this one works out since it was brought up.
IR, I am interested and will definitely check back to see if you find out anything. I have noticed that my water stinks at different times of the year, and neighbors (including my plumber) have noticed the same. It almost follows the season changes, very odd!
QUOTE=Alphacowboy;363387]Love the USA, I am guessing they use the magnesium over aluminum due to aluminum being lower on that scale, meaning it deteriorates faster than magnesium? I should look into swapping in an aluminium rod, my well water from time to time stinks pretty bad.[/QUOTE]
Incorrect......Of the 3 popular sacifical anodes magnesium, aluminum, and zinc; magnesium has the most negative electropotential (which in simple terms means it will give itself up more easily followed by aluminum and then zinc). This is depended on many variables eg. the liquid the anode is placed in, heat, the metal it is to protect...etc.... For more information check out the "galvanic series"