(1) Composition of Medium and Concentration: The impact of concentration on corrosion varies; for instance, in hydrochloric acid, generally, the higher the concentration, the more severe the corrosion. Carbon steel and stainless steel are severely corroded in sulfuric acid, with a concentration of around 50%; however, when the concentration increases to above 60%, the corrosion rapidly decreases.
(2) Impurities: Harmful impurities such as chloride ions, sulfate ions, cyanide ions, and ammonia ions can cause severe corrosion in certain conditions.
(3) Temperature: Corrosion is a chemical reaction. The rate of corrosion increases by 1 to 3 times with a rise in temperature of 10°C, but there are exceptions.
(4) pH Value: Generally, the lower the pH value, the greater the corrosiveness of the metal.
(5) Flow Rate: In most cases, the higher the flow rate, the greater the corrosion.
