hydrochloric acid
It burns down the dirt and cannot burn down the metal used
Pickling. http://en.wikipedia.org/wiki/Pickling_(metal)
No, it is a chemical change.
Sulfamic acid is used to clean dentures.
Galvanic acid is a strong acid used mainly for electroplating processes to clean or etch metal surfaces before plating. It is typically a solution of sulfuric acid with additives to improve its effectiveness as an electrolyte.
When used in the right strength they remove scale and dirt without eroding parent metal. Hence they are good. Sometimes acid mixtures are used in pickling to achieve better surface, for instance Titanium surface can be cleaned well by nitric acid and hydroflouric acid.
Muriatic acid can be effectively used to clean calcium deposits, but extreme caution should be used. Only use it if you have plastic plumming, as it is corrosive to metal pipes used generally in older homes. Muriatic acid will burn skin and if it gets in the eyes, it can cause blindness. When using muriatic acid to clean calcium deposits in toilets, the results will be immediate. Your toilets will look brand new!
Muriatic acid can be used to clean dishwashers. Muriatic acid is very strong and should only be used occasionally for cleaning the dishwasher.
Hydrochloric acid is commonly used to dissolve metal. When metal is exposed to hydrochloric acid, a chemical reaction occurs where the acid breaks down the metal into ions, releasing hydrogen gas in the process. This reaction is known as metal dissolution.
When an acid reacts with a metal, it typically forms a salt and hydrogen gas. The metal displaces hydrogen from the acid, leading to the release of hydrogen gas and the formation of a salt made up of the metal cation and the anion from the acid.
It is thought that the acid in Coke can clean some types of metal. Like copper.
The acid-core preps the metal for better adhesion.