burns and cancer for the most part
No you can't get Parkinsons from welding. you either have it or you don't so welding doesn't cause it.
Welding anywhere on your car is not recommended unless you disconnect the battery. Especially TIG welding.
a sound weld will have similar characteristics to the base metal. be free of cracks and fully fused to both surfaces and free of contamination.
Flash Burn and Blindness
A welding related injury can be treated with Neosporin and a bandage in most instances. If the burn is very bad, a doctor will need to treat the injury with special cremes.
Welding smoke is typically loaded with metal fumes. If you are welding mild steel, the fumes are not that bad because iron is not particularly toxic. Welding chrome or stainless steel can release some fairly dangerous fumes such as nickel and hexavalent chromium. Using an appropriate respirator or getting sufficient ventilation can provide protection.
The Oxy-acetylene flame is much hotter and the preferred combination for the welder especially when welding pipe and plate metal. Somewhat of a rare welding procedure in modern times. Replaced by arc welding. Liquid Propane Gas burns cooler and is preferred by employers as it is cheaper. Not bad results on light gauge material, again takes longer to heat up. -RedSeal Welder
While welding may cause a face burn if proper protective equipment is not used, that burn is caused by heat and light from the welding process, not from ozone. Where ozone is released in sufficient quantities, it may cause cough, headache, deep lung irritation and, in the more eggregious cases, pulmonary edema (fluid in the lungs)
roster welding
One type of welding is tube welding. Another type if mig welding.
SAW welding is a type of arc welding while ERW welding is spot or seam welding. SAW stand for submerged arc welding while ERW stands for electric resistance welding.
smaw welding is sheilded metal arc welding