The action is by oxygen and water on a clean surface. It is our policy to passivate the SUS 316L and SUS 316LN austenitic SS tanks with 14% by volume cold Nitric acid. It is also our policy not to include hydrofluoric acid in a passivation solution. Hydro-flouric acid is a pickler which removes chromium and nickel along with heat hardened scale, it NOT a passivator. The concentrated acid you get on board in 200 litre drums is usually 68%. Contact time for Nitric acid is 2 hours.
Mineral salts can come in varieties. They are inorganic salts and include phosphate, calcium, chloride, sodium and potassium. One of the most common mineral salts is iodized salt. Iodine is essential to the function of the body as an iodine deficiency can be problematic.
Bath salts are a type of designer drug of abuse. The reason these drugs are commonly called bath salts is because they tend to be in the form of white powder or crystals. However, these substances are not at all the same as the bath salts in which people bathe. Many of the bath salt drugs include mephedrone, methylone, and methylenedioxypyrovalerone (MDPV or MDPK) and are synthetic cathinones, which are found in plants commonly called khat. These drugs and are chemically similar to stimulant chemicals like cocaine or amphetamines.