However, they sell acid there in a diluted form to a density of 1.27 grams per cubic centimeter under the name "Electrolyte for lead batteries." You need to mix this electrolyte with distilled water in a 1:1 ratio.
If you take a standard 5-liter canister with chinese overseas australia data and the same amount of water, you will end up with 10 liters of anodizing solution. This is enough for small parts, and for large ones it is worth doubling this amount.
Remember that mixing acid with water will release a lot of heat. If you pour water into acid, it will immediately boil, splashing into your face! That is why it is recommended to pour the electrolyte into a container with water in a thin stream, constantly stirring with a glass rod. And it is better to wear protective glasses! If acid gets on your clothes or skin, immediately wash it off with a stream of water and rinse with a soda solution.
Processing modes
The temperature of the metal anodizing process is -10 — +10 degrees Celsius. The growing layer below -10 is quite good, but the voltage supplied by the power supply is not enough to maintain the required current. Above +10 degrees, the protective film will form, but it will be soft and colorless.
However, it is recommended to stop the anodizing process already at 5 degrees above zero. And here's the thing: in the corner of the bath and on the surface of the part, there is a different temperature, and during anodizing, a lot of energy is released in the form of heat.
But if forced mixing of the electrolyte is not ensured, you cannot trust the thermometer! However, it is necessary to constantly mix the electrolyte, with a spoon, air, a pump, this is necessary to equalize the temperature on the surface of the aluminum product. Otherwise, areas of local overheating will form on the part, and then breakdowns and corrosion of the part.