There are two ways to get ferric chloride solution, one is to buy from the manufacturer, the other is to make it by ourselves. No matter which way, we need to know how to make ferric chloride solution and the raw materials needed for preparation. Next, we will share the preparation method of ferric chloride solution with you, let's have a look!
Raw materials needed for preparation of ferric chloride solution: solid ferric chloride, water, HCl hydrochloric acid.
If it is ferric chloride hydrate, add water directly and then add hydrochloric acid.
If it is anhydrous ferric chloride, it should be dissolved in concentrated hydrochloric acid first, and then diluted with water.
It is necessary to calculate the amount of solid FeCl3 and water in advance according to the concentration of the ferric chloride solution to be prepared by oneself, then weigh it, and then mix it while adding water. At the same time, add a certain concentration of hydrochloric acid solution in it. It is also required for the environment when preparing the solution. As for the temperature, it is better to be at 40 ℃. The amount of water added to the solution will directly affect its concentration. If you use ferric chloride solution to do acid corrosion of some copper foil, you need to determine the concentration of the solution according to the corrosion time. In addition, the temperature will also have a certain impact on the corrosion speed.
To prepare the solution to corrode the circuit board, it can be prepared according to the mass ratio: 35% ferric chloride and 65% water. The concentration requirement of ferric chloride is not very strict. The corrosion rate of solution with high concentration should be faster than that of solution with low concentration. When the PCB is corroded, the best solution of FeCl3 is 30~50 ℃, and the highest is not more than 65 ℃. During corrosion, the circuit board can be clamped by bamboo clips and shaken in ferric chloride solution to speed up corrosion. Generally, the circuit board can be corroded well within 15-30 minutes.
The prepared ferric chloride solution can be used for many times. Dissolve the ferric chloride in the distilled water added with a small amount of dilute hydrochloric acid, and then dilute it to the required concentration. The purpose is to prevent the ferric chloride solution from being turbid due to hydrolysis. However, if there are many precipitates in the solution, the ferric chloride solution should be prepared again.
After reading the above introduction about the preparation method of ferric chloride solution, do you know more about how to prepare ferric chloride solution? If you are interested in our company's ferric chloride solution, please leave a message or call: http: / /: www.jinhao360.com, we will make you satisfied with our reasonable price and high-quality service.