hello everyone, do aluminum alloy or steel motorcycle frames change their microstructural characteristics over time even without the vehicle being used? Assuming you have two identical frames, one many years old perfectly preserved and sealed, the other new from the factory, both without work...
Good evening everyone, I'm restoring a vintage car that has some corrosion points (rust) inside the overlapping joints of the sheet metal, nothing serious but it is present. On the inside of the body I tried to lift the metal near some spot welds and I noticed that practically every spot weld...
Hello everyone, I ask for some clarifications on aluminum from those who can help me.
First info: let's assume a painted aluminum surface that is scratched in a small spot with a non-humid climate, if it were steel we would see rust over time, but being aluminum will it protect itself even if...
Hello, I would like to ask a few things about aluminum: the protective oxide layer that forms spontaneously in contact with air, in the absence of corrosive agents,in normal room temperature, no water or mechanical actions, remains unchanged over time, continuing to protect the underlying...
Hello friends, i have a question about this motorbike frame in aluminum alloy.
over time, the mirror polishing has oxidized and I wondered, is it aluminum that protects itself?
in the absence of corrosive agents it should remain so and the corrosion stops by itself, right?
Hello everyone, I would like to ask the experts if anyone could explain to me the pitting and intergranural corrosion in aluminum, is it a type of corrosion that develops even without the use of the vehicle?
As a motorcycle and car collector I am always worried about the corrosion of the...
Will the original threads of modern cars rust over the years if anti-seize is not used? I don't think they put anything in the original assembly but I imagine there is still some air in between
Hello, speaking automotive sector, the Volkswagen workshop manual says that some bolts must be tightened to Tot nm + 90 °. How should I orient myself considering these variables?
The first assembly bolts are greenish, the new ones I bought are gray with something that look like zinc coat, are...
Does the use of threadlocker change the tightening torque of the bolts? I would like to use it to seal the thread from moisture and corrosion but if the tightening torques change, it is a problem. I have to use torque-to-yield bolts, for a car subframe and engine mount, this bolts are designed...
Hello, Is there a thread sealant that allows to seal the metal from corrosion and keep the tightening torque unaltered? I have to use torque-to-yield bolts, for a car subframe and engine mount, this bolts are designed to stretch during the torquing.
I think about threadlocker, grease, silicone...
Hello to all, thinking about car chassis, when it is used we should not always have corrosion due to fatigue at the welding points since they are points of high stress that often do not have a fatigue limit? shouldn't they show micro cracks that will corrode in a short time? I think the coating...
The chassis of the cars is designed to have An infinite life fatigue, but the frame is held together by spot welds on which I have not found any articles that demonstrate a real fatigue limit, so how is possible therefore that the frame has an endurance limit but the welds that hold it together...
Speaking of cars, in particular of the steel chassis, if we keep a car stopped for years, even a new car, will the weight of the engine and all the components form cracks in the crystalline microstructure of the steel?
if we think about a spring, if we leave it compressed for so long...
