Electrolysis on new camper

...can we see a tight-up photo without uncovering the manufacturer (if this is the way you wish to go) ?

1. Am a right to be concerned that if they fix this problem, it could surface elsewhere? If not in a years time, perhaps in 2 or 3 years when it's out of warranty?

2. What would cause this electrolysis and how can it be prevented?

3. What are my options in dealing with the RV dealer that I purchased it from? Ask for a full refund? Get another camper? Get them to fix the one affected area and pray it doesn't happen again?

1) Just fixing the symptom, corrsion, won't fix the problem. Any fix by the dealer would require an explanation of what caused the problem to begin with.

2) Dissimiliar metals and stray current are the 2 most common sources.

3) The rash on your siding should be relatively close to the source of the problem. If they remove some siding and identify/fix the source of the problem, I'd feel confident in your camper.

I worked on boats for years. In that time I saw a lot of damage done by electrolysis. In most severe cases it was caused by stray current. Some time we would find a chafed wire some time it would come from the shore power ground. I would install a galvanic protector to the boats AC ground and make sure all the sacrificial anodes were in good shape. I don't know if any of these measures would work on TTs. I would disconnect your shore power and battery to see what happens. You could try calling a marine electrician.

It's the unlike metals causing this. Galvanized screws thru the aluminum is a common problem. Added too, is the screws, now a days, have even lesser grade of metal (level of integrity) causing more corrosion=== electrical charge.

Going to good stainless screws always stops this problem. Aluminum boats have to use the best stainless screws possible. You can tell the better screws using a magnef as the will have little or no magnetic attraction. Meaning having no iron in them.

Electrolysis is a process present in many types of aluminum corrosion, not the root cause of the corrosion per se. What you're seeing is most likely some type of galvanic, pitting, filiform or crevice corrosion. All of these types of corrosion require the presence of an electrolyte (moisture), which is most likely the cause of your problem.

Galvanic corrosion takes place when two different metals contact with each other in the prescence of an electrolyte. Galvanic corrosion does not happen in dry surroundings. In surroundings with chloride however (for example near the seaside), the risk of galvanic corrosion always exists.

Pitting is a frequent type of corrosion of aluminium and occurs due to the presence of an electrolyte. The corrosion is seen as very small pits and only penetrates a small way into the surface when induced in air. However, in water and earth larger pits can occur.

Crevice corrosion can arise in small crevices filled with fluid.

Filiform corrosion occurs under painted or plated surfaces when moisture permeates the coating. Lacquers and "quick-dry" paints are most susceptible to the problem.

If the moisture causing the corrosion in your camper is being caused by a leak, by fixing the leak you will also fix the corrosion. If the moisture is atmosperic however, it may be a more difficult problem to address. Coatings, sealants and barriers are critical to protecting aluminum from atmospheric moisture.

:):)

Can you post some pictures?

Is the evidence around screws?

I have not heard of this on a camper before and not sure what you are talking about?
Does it need hair removal?
Is it a method of using a direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction?

Just curious....