When Mechio met his boss behind the scenes with nervousness and excitement, he saw Marin who smiled like a chrysanthemum. Of course, unlike the chrysanthemum that Maximilian I laughed, Maximilian I, who was almost 50 years old, was an old chrysanthemum that was about to wither. Marin was still handsome and a daisy laughed...
"Hey, our boss has seen it, why do we smile so slutty? It seems that we owe a lot of money to others... No, isn't it said that he is one of the richest nobles in Europe?" Meqio was confused and even suspected that Marin was not Marin in front of us. However, Marin was wearing exquisite armor with family emblems and sitting in the main seat, and most people dare not sit like this. In this era of strict hierarchy, it would be a death for people to wear clothes and sit in the random seat.
"Mechio, manager of the Florence branch of the Italian branch of the North Sea Chamber of Commerce, has met his master!" After saying that, Mechio bent down with a flattering face.
Logically speaking, Marin is just his boss, and he is not a slave to Marin, so he doesn't need to be called the master. Even if Kahn and others were Marin's servants back then, they had never called the master (you can also call it that way). Therefore, this guy is definitely a flatterer who is extremely flattering.
Suddenly, Marin made up such a scene in his mind - a coat slave with a rat tail dragged behind his head and knelt in front of an Eight Banners' child with a flattering face and said, "I have seen my master"...
For no reason, Marin suddenly felt a sense of disgust in her heart. However, thinking of the sulfuric acid brought by this guy, Marin couldn't control her smile immediately. Because, with these sulfuric acids, he was not worried that he would not be able to break the Iron City Gate of Siena.
So Marin started chatting with Mechio, a flatterer...
After a conversation, Marin learned that the sulfuric acid sent by Mecchio this time was all the sulfuric acid produced by several alchemists in Florence in three months, with a total of 100 clay pots, each of which looked almost one liter, were dilute sulfuric acid of average concentration. The reason why they were used in clay pots instead of oak barrels was because sulfuric acid corrodes the oak barrels. However, dilute sulfuric acid was enough to dissolve the iron gate. If it was replaced with concentrated sulfuric acid, it would not dissolve the iron gate. Because concentrated sulfuric acid would form a protective film with iron. Marin even wondered - when using dilute sulfuric acid to dissolve the iron gate, should we collect hydrogen to make hydrogen balloons?
Then, Marin was too lazy to pay attention to Mecchio, and after promising to promote him and reward him with 500 gold coins, he sent him back to Florence.
After sending Mechio away, Marin excitedly brought the army and the cart of dilute sulfuric acid in total 100 pots of dilute sulfuric acid back to Siena.
That night, while the enemy was not paying attention, Marin arranged for a trusted special forces member (this tactic is also a secret) to hold a pot of dilute sulfuric acid, avoid the enemy's sight on the top of the city, and quietly touched the large iron gate at the northwest gate of Siena. Then, the soldier carefully picked up the pot and splashed the dilute sulfuric acid in the pot on the large iron gate of the northwest gate of Siena...
But what surprised the special forces soldier was that the iron gate did not dissolve a large hole as Marin said, but flowed down the iron gate, which caused slight corrosion to the bottom of the iron gate. However, the effect was not very obvious. If we were at this efficiency, even if we used all the 100 cans of dilute sulfuric acid, it would not corrode the large iron gate...
So, the special forces member immediately went back to report the unfortunate news to Marin...
"What? The corrosion rate is very slow? And it all flows to the bottom ground?" Marin was shocked - was his plan going bankrupt?
"Yes, this acid cannot stay on the outside of the erected large iron gate. Once it is splashed, it will flow down the smooth surface of the city gate. Even at the bottom where the acid liquid gathers, it seems that the corrosion rate is very slow."
"The corrosion speed is very slow?" Marin thought for a while, then suddenly realized...
"My brain, this memory!"
Marin suddenly remembered that in his previous life, a chemistry teacher said that in the laboratory, metal zinc is generally used to prepare hydrogen. This is because zinc is much more active than iron. It is feasible to react with iron and dilute sulfuric acid, but the speed is very slow. Therefore, in order to show the phenomenon of hydrogen production, zinc metal with higher activity is generally used to react with dilute sulfuric acid or dilute hydrochloric acid to produce hydrogen. You can see the obvious process of bubble rise. If iron is used, it seems that it will be much slower.
Moreover, splashing dilute sulfuric acid on the large iron gate and putting iron into dilute sulfuric acid are completely different. Soaking iron in sulfuric acid and the contact area is sufficient. Even if the speed is slower than zinc, the effect will be obvious over time. However, splashing dilute sulfuric acid on the iron gate will be different. First of all, the iron city gate is erect. When splashing dilute sulfuric acid on the door, it will not stay on the door at all, but will flow down the city gate to the ground. Before you have time to contact the reaction slowly, it lands. In addition, the reaction speed of dilute sulfuric acid and iron is not fast, and it is very wasteful of sulfuric acid.
In addition, the Siena people have money and the iron city gate they have made is thick enough. If you want to corrode the iron city gate with these 100 cans of dilute sulfuric acid, it seems that the feasibility is not high...
Also, Marin remembered again - it seems that even if he used zinc metal to make hydrogen in his previous life, he ground zinc into zinc powder, in order to increase the contact area as much as possible. If it is a whole piece, it will be much slower. Because if you want to corrode the metal inside, you have to corrode the outside part first...
Iron is not fast to react with dilute sulfuric acid, and it is a whole piece of large iron door, so it is impossible to throw the iron door into the dilute sulfuric acid pool... Therefore, it is difficult to corrode and destroy the large iron door facing the back with dilute sulfuric acid... At least, this car is not enough...
In addition, Marin thought of a very serious problem - even if he could corrode a big hole in the thick iron city gate and stuff it into a powder barrel, it would not blow up the city gate...
Why? Because the iron city gate is not the same as the wooden city gate made of oak...
Generally speaking, if it is a wooden city gate, as long as you make a hole in the city gate and stuff it into a powder barrel, you can blow up the city gate and get the road to enter the city.
However, it is only because the oak city gate is easily destroyed and the roads entering the city appear. Nowadays, the city gate is an extremely thick iron city gate. Even if the buried gunpowder barrel explodes, it may not be able to explode the heavy steel city gate. If the city gate is not damaged, what's the point of corroding the iron city gate out of a small hole that can be stuffed into the gunpowder barrel?
Chapter completed!