psychochemist

Chapter 22 Colors
The master said peacefully: "In the process of machining, we have used many kinds of cutting fluids. These cutting fluids have their own colors, but these cutting fluids will gradually change into other colors during use. I haven't found a pattern, and I want to hear your opinion from experts."

Yu Fan: "Excuse me, what color did they all become? Give me an example."

Teacher: "For example, we used synthetic cutting fluid before, and after using it for a while, the cutting fluid turned red."

Yu Fan replied with a smile: "Well, master, I would venture to guess, was the material you processed during that period hard alloy? You also chose alloy knives?"

Teacher: "Yes, you are right."

Yu Fan went on to say: "This is a typical cobalt precipitation phenomenon. The formula of fully synthetic cutting fluid often contains substances such as triethanolamine and sodium phosphate, which will react with cobalt in cemented carbide and tools to form complexes, and then The cobalt ions are precipitated into the water, and the cutting fluid turns red. At this time, when you choose the cutting fluid, you only need to choose the one that prevents the precipitation of cobalt, and you can solve the problem.”

At this time, another master also stood up: "However, what I saw was another color. After using my machine tool cutting fluid for a period of time, the color turned blue, and it was also transparent before."

Yu Fan turned his head and explained to the master with a smile: "This kind of situation usually occurs when machining copper parts. The cutting fluid reacts with copper and produces copper ions that enter the water. If the water tank is not cleaned in time, this phenomenon will also occur, because copper, cutting fluid, and water tank will form a galvanic reaction and accelerate the precipitation of copper."

The workers nodded repeatedly.

At this time, a female worker in her 40s stood up and asked, "What's the matter with turning black?"

Yu Fan: "It's turning black. Apart from seeing it turning black, don't you often smell some unpleasant odors?"

The female master nodded again and again: "Yes, yes, there is often the smell of rotten eggs, and the smell is especially serious every time I come back from vacation."

Yu Fan: "This is because the cutting fluid has deteriorated. If you do not pay attention to the maintenance of the cutting fluid, the concentration is too low, the PH value is too low, and the anaerobic bacteria will multiply in large numbers and grow geometrically, leading to the rancidity of the cutting fluid. Hydrogen sulfide gas is released. In this case, pay more attention. Add some fungicide quickly to see if the bacteria can be controlled. If it can’t be controlled, you can only replace the cutting fluid. Pay attention to maintenance when using it in the future .”

The workers and masters nodded one after another.

Yu Fan added: "Actually, you have also seen that the same thing will turn into different colors under different circumstances, and there are reasons behind each color. When we observe a phenomenon change, it is You should be like everyone, keep your curiosity and ask a lot of questions, people will make progress, and technology will make progress."

The masters seemed very happy, as if they had found a chemical expert, and they took out all the problems accumulated over the years.You know, in the machinery factory, there are really very few people who really understand chemistry, and everyone asked a lot of questions, each question was more professional than the last, trickier than the last, and there were even questions about mechanical design, etc. .But Yu Fan answered all questions calmly, from mechanism to characterization, from problem to solution.

Time passed quickly, and it was almost time to get off work, but everyone still had something to say.Director Shi had to forcibly interrupt the sharing session: "Okay, okay, let's stop here today, Expert Yu and the others are going back."

Everyone left reluctantly.

Director Shi shook Yu Fan's hand again: "I know your professional ability is very strong, but I didn't expect it to be so powerful. In addition to chemistry, you know physics and biology very well, and you even know our mechanical design and manufacturing."

Yu Fan waved his hand and said modestly: "I only know a little superficially, and I'm making a fool of myself when I say something wrong."

Director Shi hurriedly thanked him: "You are too polite, it's getting late, let's have dinner together in the evening before we go on our way."

Yu Fan declined: "Thank you Director Shi for your kindness, we have other things to do when we go back, let's get together next time."

Director Shi didn't force them to stay, he accompanied Yu Fan and Cao Ben all the way to the car, and sent Yu Fan and them to the car, until Yu Fan's car drove away, Director Shi was still watching them and waving until they disappeared. in view.

On the way back, Cao Ben sighed: "Oh, really, heaven has eyes, it seems that this client will not be lost, and good people are rewarded, right? Old Yu."

Yu Fan grinned: "Good and evil will be rewarded in the end, the way of heaven is reincarnation. Look up to the sky, who will the sky bypass."

Cao Ben also added: "Good and evil will be rewarded, but the time has not yet come."

Yu Fan was also happy: "Indeed, good and evil will eventually be rewarded, and no one can predict when it will come. While waiting, what we can do is to patiently enrich ourselves every day and find the truth about how the world works."

Cao Ben asked: "Old Yu, what do you mean?"

Yu Fan: "Human life is very short, and we are more like passers-by when we come to this world. Have you ever thought about the meaning of our coming to this world? Perhaps before everyone came to this world, we all In another parallel universe, each of us received the same test paper. The content of the test paper is to let everyone come to the earth for a decades-long experience. When we leave this world, we will return to that parallel universe. Cosmos, write down what you have seen, thought, and realized in this life on the test paper, and finally hand over a satisfactory answer. It's just that many people forget the test paper when they came here in the first place, and are overwhelmed by this colorful world. absorb."

Cao Ben asked again: "Then what should we do?"

Yu Fan: "Calm down and do our best. Fight bravely and make persistent efforts. Just like we do experiments, although it is an experiment, we will do our best every time. But we will not worry about gains and losses, because experiments fail. Come on, life is the same, as long as the consciousness is in the present, it is a new beginning.”

Cao Ben smiled wryly: "I don't understand this a bit, haha. But I think the topic about color you talked about today is very interesting. After I go back, I will sort it out and teach it to the company employees. This kind of problem can be talked to users.”

Yu Fan nodded and looked at the dark night sky, where the street lamps under the night sky were flickering.

Yu Fan was thinking about something.color?

　The earth is trampled on all day long, but it has never complained about it.Not complaining, is a symbol of connotation - hydrogen sulfide
　　
　
(End of this chapter)