Chapter 1174

"Next, Brother Chen, please put on this and this one..." Wang Yang brought a set of white coat masks and gloves and handed them to Shen Kuo.

"Because chemicals are very corrosive and dangerous, it is best to prevent accidents. A hat can prevent our hair from falling into the chemical, and clothes and gloves can slightly reach the chemical splash. As for these glasses, it is naturally to prevent chemicals from burning our eyes."

"The masks are designed to prevent some volatile chemicals from harming our respiratory system..."

Shen Kuo held the equipment blankly and watched Wang Yang wear it in front of him. Wu Qilang and Wanyan Aguda also wore such a set of equipment. For the sake of his own safety, Shen Kuo also took the same dress.

Wang Yang's chemical laboratory has been established for almost a month, but most of the time he is conducting various experiments himself. If Xuchang and Wang Lie are there, then they will act as Wang Yang's assistant. If the two are not there, Wu Qilang and Wanyan Agu will fight to the top.

Occasionally, when Wang Yang is interested, he will guide Xuchang and Wang Lie, who are very interested in physical chemistry, to conduct some interesting and less dangerous chemical tests.

A cup of high-concentration green alum oil and a cup of low-concentration green alum oil were placed on a clean white tablecloth, and next to it were a few metal strips with shiny metallic luster, and a few were dark and slightly yellow rusty metal strips.

At this time, Wang Yang picked up a special crystal glass clip and carefully carried one of the rusty metal strips into the low-concentration green alum oil. He could soon see fine bubbles appearing on the surface of the metal. In a short while, the yellow rust began to fall off.

By the time Wang Yang lifted the rusty metal strip again, the rust on the surface had disappeared without a trace.

"This is what you said about acid-cleaning and rust removal, right?" Shen Kuo was a little excited. He had never seen such an interesting scene before, or it should be said that he could watch the rust falling off due to acid washing.

"Yes, and here, there is already green alum oil with a concentration of at least 70% or more. What will happen to this rusty iron bar? Please see..." Wang Yang was like an excellent chemistry teacher, once again raising the rusty iron bar and immersing it in a high concentration of concentrated sulfuric acid.

Only sporadic bubbles can be seen appearing on the metal surface, but there is no scene where a large number of bubbles will be generated when the low-concentration green alum oil is immersed in.

"This... this is too strange. Low-concentration green alum oil can corrode the rust spots, but high-concentration cannot do it?" Shen Kuo's face was full of doubts, and in the end he asked this question.

"Is this really a high concentration of green alum oil? Or something else..."

"Actually, it's very simple to test whether this is a high concentration of green alum oil." Wang Yang smiled and nodded at Wanyan Aguda next to him.

Wanyan Aguda took a glass plate and then took a ball of cotton from the side.

"Brother Chen, this is cotton. Next, I will use low-concentration green alum oil and high-concentration green alum oil to drip it on it, and you will know the authenticity."

While Wang Yang was talking, he absorbed a few drops of low-concentration green alum oil and dripped onto the cotton first. A stream of clear smoke immediately appeared. Then the snow-white cotton began to produce a large amount of foam. It changed carbon and blackened at a speed visible to the naked eye.

"Green alum oil can turn cotton into carbides, and I named this process carbonization reaction." Wang Yang sniffed, and it was very awesome and authentic.

"Next, please look at the carbonization reaction of high-concentration green alum oil dripping on cotton..." As he spoke, high-concentration green alum oil dripped on cotton. This time, the reaction was more intense and the carbonization process was faster.

Now, Shen Kuo had to admit that Wang Yang did not commit fraud, this was really a high concentration of green alum oil.

"Mr. Chen actually suspected his brother. It's really... But if it weren't for this experiment, it would be hard for Chen to believe that this high concentration of green alum oil actually had no choice but to use the rust spots."

Next, Wang Yang took a piece of metal strip with a very bright metallic luster, then immersed it in concentrated sulfuric acid, let it stand for a period of time, then took it out and placed it in a crystal glass plate that had been prepared long ago.

At this moment, the originally dazzling metallic luster was already dim, and a dark color appeared on the surface of the metal.

After leaving it for a while, Wang Yang brought cotton and wiped off the remaining green alum oil on the surface. Then he rinsed it with clean water, and then dared to hold it in his hand.

"Please see, a passivation film has been formed on the surface of this metal. With this passivation film, steel products that are extremely prone to rust will become difficult to rust."

"What should we do to know if it is really successful in passivation?" Shen Kuo took the passivation metal strip and looked at it carefully and asked.

"It's very simple. There is also a piece of metal made of the same material here, but it has not been passivated. You only need to place these two metal strips in open air. I believe that in a few days, you will understand whether the metal after pickling passivation has an anti-rust effect."

Wang Yang picked up a piece of metal strip that he had not had time to use for experiments and handed it to Shen Kuo and explained.

"It's reasonable, then Chen will try it now..." He took the metal strip from Wang Yang, held one in one hand, and left the chemical laboratory without looking back, leaving the three people in the room who were still confused.

"Well, huh? Brother Chen, Brother Chen, you... wait first... you haven't changed your clothes yet..." Wang Yang was stunned for a while before he realized, and rushed out of the laboratory with a lunge and chased forward...

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Shen Kuo smiled awkwardly and returned to the chemistry laboratory to take off his equipment, but he still held the two metal strips tightly.

Seeing Shen Kuo looking at his chemistry laboratory with envious expression, Wang Yang raised a strange curve on his lips. "If Brother Chen doesn't dislike my simplicity, he can come here often, my chemistry..."

"Okay, this is OK, so I'll come here often to bother you. However, can I bring one or two people here? Chen also has several disciples under his command..."

Wang Yang was not displeased by Shen Kuo's interruption, but instead nodded happily to agree to Shen Kuo's request. "Of course there is no problem. It is naturally a good thing to be able to learn from Brother Chen and your disciples."
Chapter completed!