Aluminum powder itself is a powdered coating that is often used as a material such as repairing scratches on cars.

The can of aluminum powder that the man in black threw away earlier was obtained from an auto repair shop not far from here, and this kind of thing is actually very common.

However, what many people don't know is that aluminum powder is actually a flammable substance, and if used properly, it can even be used as a powerful explosive!

Today's junior high school students should have done a middle school experiment called a flour explosion.

The process of the experiment is to use a large plastic oil pot, remove 1/3 of the part from the mouth, leave 2/3 of the part, use it to buckle the flour on the wooden board and the burning candle, blow through the latex tube, and the flour burns to produce a large amount of heat to overturn the plastic barrel, the phenomenon is very obvious. The reason is that the flour will have very fine dust, when these dusts are suspended in the air by a trace of force, and reach a very high concentration, such as 9.7g of flour per cubic meter of air, once it encounters fire, sparks, electric arcs or appropriate temperature, it will burn up instantly, forming a violent explosion, which is no less powerful than a bomb. Dust becomes an "explosive" because it has a large surface area. Compared with bulk substances, dust has strong chemical activity, a large area in contact with air, more adsorption of oxygen molecules, and a fast oxidation and exothermic process. When the conditions are right, if one of these grains of dust is ignited by fire, a chain reaction occurs like a nuclear bomb, and an explosion occurs.

In addition to flour, the dust of other combustible substances can also cause dust explosions, in which the power of metal dust explosions is greater than that of flour, pulverized coal, and sawdust, and occurs in confined spaces, just like explosives, because metal dust is conductive, and the energy is transmitted faster, the power of the explosion is greater, and the power is no less than a bomb.

Among them, the most powerful is aluminum powder, the lower explosion limit of aluminum powder in the air is 37~50 mg/cubic meter, the minimum ignition temperature is 645 degrees, the minimum ignition energy is 15 millijoules, the maximum explosion pressure can reach 6.3 kg/cm² (equivalent to an instantaneous increase of 63 tons of weight per square meter area), the minimum oxygen content of the explosion in nitrogen is 9%, and the air temperature generated during the explosion is as high as 2000~3000 degrees. In the management of chemical dangerous goods, aluminum powder is classified as Class II flammable.

And we know that although diamond is respected as the hardest substance in nature, its ignition point in the air is only 800 degrees, so it cannot resist the high temperature combustion of more than 2,000 degrees, so this layer of diamond armor is burned through as if it was paper.

In addition, diamond is a crystal, and its thermal conductivity is much stronger than that of metal, so even if Ding Qingcheng has been using his superpower to regenerate diamond armor, he will be burned to death by the heat generated by the explosion.

"Fight with superpowers...... Physics has to be good......"

The man in black lay on the ground panting and said......

......

To the west of the square, in a gloomy courtyard.

"When did you wake up?"

"It's been a while since I woke up, and I've woken up from this room," Yang Weinan said, pointing to the dilapidated room next to him.

Zhuge Shuangying walked into the house and took a look, and found that there was a dilapidated metal bed in this dilapidated room, and there was not even a mattress on the bed, and the wooden bed board in the middle was broken in several places, but it did not collapse.

"Have you seen anyone else around here besides you?"

"I haven't seen anyone else......"

Zhuge Shuangying looked at Comrade Yang Weinan opposite, and couldn't help but be very helpless.

Sora rejoiced......

"Forget it...... You can go......" Zhuge Shuangying pointed to the road outside, and said helplessly: "Turn the bend in front of you, go straight to the west, and you can get on the road." ”

If Yang Weinan received amnesty, he thanked him repeatedly, and hurriedly ran away.

"Anyway, the people of the knife group are estimated to be outside, and this person can still stop it. Zhuge Shuangying thought secretly.

But when Yang Weinan didn't run away for long, he heard a terrible scream from the direction he ran away: "Ah!!!!!!!!"

Zhuge Shuangying was startled, and said in his heart: Won't it? So he immediately eliminated his sense of existence and rushed over in an instant.

As soon as he reached the corner, he found a pool of blood on the ground, and Yang Weinan was nailed to the wall in a very strange posture, his face full of fear.

This is only according to him is only 20 meters down the alley, a turn of the effort. has already been killed!

In the dark, Zhuge Shuangying's brows furrowed......

Then he found a faint spiritual power and swept over!

Zhuge Shuangying was shocked! Oh no! It was discovered! It was the spiritual power locked!

It's too late, it's too fast, Zhuge Shuangying's ability is activated in an instant, and the force will disappear its own existence.

In the next moment, the sky above Zhuge Shuangying suddenly shot down dense small stones!

Seeing that a lot of stones fell to the ground with a bang through themselves, smashing out one big pit after another, Zhuge Shuangying couldn't help but sweat and jumped to the side.

I was so careless today that I was plotted!

"What should this ability be?" Zhuge Shuangying thought for a moment, but felt that there were too many abilities that could cause such an effect, and there was no way to rule it out, so he immediately jumped on the roof.

Let's take a look.

Although the existence of the disappearing state can basically be immune to all physical attacks, but because the existence of the disappearing state is equivalent to non-existence, so you can't use the **temporary command, you can only temporarily remove the existence of the feet disappearing state, and then seize the gap and eject it in one breath.

Zhuge Shuangying carefully moved to a distance, briefly sensed whether there was a spiritual force sweeping around, and after confirming that there was no problem, he lifted the state on his feet, and then bounced lightly to the roof in an instant, because there was basically no air resistance, so there was almost no sound.

The space on the roof is relatively empty, which is still more advantageous for Zhuge Shuangying. So I looked around carefully, but found that there was nothing unusual around.

It seems that the other party is also very calm!

The enemy is dark, I am dark!

Zhuge Shuangying believed that the other party would definitely not be the same anti-reconnaissance ability as him, because the small pebble that fell like a meteorite before had already vetoed this point.

Now, if one of the two sides makes a big move, it will inevitably be known to the other side at the same time.

Within two minutes, a gentle breeze swept in......

Zhuge Shuangying's body shook slightly......

I feel it!

......

on the square.

The man in black struggled to his feet, removed the box behind him, opened it, and pulled out a small package, a few band-aids, a bottle of alcohol, and a roll of bandages.

The man in black used a small bandage dipped in alcohol to clean his wounds little by little, and then bandaged the larger wounds with the following simple bandages, and then covered those small wounds with a band-aid.

Holding the large rectangular box more than one person high, he slowly stood up, and walked towards Ding Qingcheng, who was basically dead, little by little......

"Let's hope that thing isn't damaged......"

(To be continued)