How to prevent aluminum powder and why you can t use aluminum powder

The great transcendent reason said:"Some atoms will have a peculiar structure, and their nuclei will break into powder, and then a grain of powder will attract an electron. "

This illustrates that the atomic structure of the aluminium powder is extraordinary.

In order to prevent aluminium powder, it is first necessary to change this peculiar powdery structure.

First of all, we need to use superhydrochloric acid to react with aluminum powder.

Since the aluminum powder will be superhydrochloric acid molecules"Magic Keys"Destruction consumes a tremendous amount of energy, causing the powdered nucleus to collapse back into a sub-powdery state.

At this time, the sub-powdered aluminum powder is still very unstable and may turn back into aluminum powder at any time.

So then we need to use element 213, which is an element that the authorities haven't yet acknowledged, but that's transcendental"The variety of elements is endless"Theories can infer that such elements exist theoretically.

If you don't have enough element 213 on hand, you can ask him for it, but the chances of getting it are not optimistic, because Chaoli once claimed"This is the result of years of painstaking research, how can I let you steal it? "

The reaction that followed is beyond the scope of human comprehension, and I won't explain it here, because it is impossible for a mind to understand without reason.

Finally, the remaining substance is mixed with antimony and sealed in a powerful hydroxide-like circle enchantment.

The prevention of aluminum powder is complete.

Adding a little antimony perantimonide to superhydrochloric acid can reduce ***, which has the best effect on preventing aluminum powder.

Taking a little ultra hydrochloric acid every day can greatly reduce the possibility of suffering from aluminum powder.

Hello, just don't eat it.

Aluminum powder is now generally not recommended. One is because the dosage is too small, which is okay in the laboratory, and it is not easy to control during production.

The second is that the expansion is unstable, the reaction between aluminum and alkali is very sensitive to temperature, and the expansion is almost completed in a few minutes in summer, while it is almost not reacted in winter.

The third is the hydrogen gas released by the reaction, which is easy to form "hydrogen embrittlement", which has a destructive effect on the steel bar.

The plastic expansion agent is made of bauxite mineral as the main material, under the condition of nitrogen atmosphere, in the presence of carbon and calcium oxide, after 1700 high temperature sintering, the product is ground by surface treatment, and the product is yellow powder.

Expansion Principle:

The recommended use of plastic expansion agent is to dry mix concrete, mortar and additives first and then add water to apply, and the plastic expansion agent after surface treatment in the cement hydration process has a certain hydrolysis resistance.

Reacts slowly with water under alkaline conditions to produce gas, which allows the cement mixture to expand before condensation. This expansion is caused by the uniform and dense distribution of fine bubbles containing mixed gases such as nitrogen and acetylene, which has no rust or damage to the concrete reinforcement.

It solves the problems of common plastic expansion agent releasing gas too fast and expanding time too early, resulting in low effective expansion value, and is perfused within 15 minutes of adding water to the product to make better use of its expansion process.

Grouting materials that are primed or pumped using conventional methods should ensure their continuous flow.

Usage:

Plastic expansion agent is a kind of plastic expansion agent used for grouting agents (materials), grouts, etc., which require micro-expansion in the plastic stage to compensate for the shrinkage in the plastic stage. The main properties are 3-hour expansion and 24-hour continuous expansion.

Features::

1. The dosage is low, and the bubble pores are uniform and dense.

2. The early expansion is obvious, and the expansion lasts for a long time.

3. The main gas generated is nitrogen, which has no rust and no damage to the concrete reinforcement.

4. The product is non-toxic, odorless, green and environmentally friendly.

5. Excellent cost performance, significantly improve the quality of terminal products.

The appropriate dosage of plastic expansion agent in the material is, and the dosage should be adjusted according to the test results.

The fire hazard of aluminum powder is that its dust is mixed with air, and if it encounters sparks, it will ** and burn. Aluminum powder can also be mixed with other oxidizing agents to form a first-class mixture. If it comes into contact with acids and alkalis, hydrogen will be produced, and hydrogen is also easy to burn in the air.

Aluminum powder is a second-class water-related combustible item, which reacts with water energy to produce hydrogen and release heat. Sometimes dry aluminum powder occurs, this is because the particles of very small dry aluminum powder can be suspended in the air, increasing the contact surface with the air, so that its chemical activity increases, once the dust reaches a certain amount in the air, encountering the ignition source, it can quickly deflagrate, instantly produce a large amount of heat and combustion products, so that gas, steam and other violent expansion, resulting in the consequences.

The use of light metals (mainly aluminum powder, in recent years, the use of iron powder, aluminum powder, etc.) and alkaline cement to produce hydrogen, and the volume of cement expansion, play a role in improving the strength of cement.

Similarly, due to the chemical reaction between aluminum powder and cement, cement bubbles are caused, and the intuitive phenomenon is that sand will rise after stepping on it. This is not to mention in railway and other projects. Generally, the pavement with aluminum powder will not take long to be repaired.

It's not very clear, but it seems to prevent thermite reaction.

When the oxide film layer is dusty, we should first try to see if it can be wiped off. It is necessary to sweep away the sealing ash and the powder of electric damage caused by the closing process. Secondly, the origin of oxidized powder ash was analyzed one by one.

Generally, the powder ash of the film is caused by the following points:1The temperature of the oxidation tank is too high; 2.

The concentration of sulfuric acid is too low; 3.The aluminium ion content exceeds 18g l. (The reason for the rapid increase of aluminum ion content is also mostly caused by the high temperature of the oxidation tank, and then there is the fact that the oxidation tank is not salvaged in time) The temperature of the oxidation tank is too high, and it is necessary to conclude that the cold engine equipment is not large enough?

If the usual cooling capacity is okay, it is necessary to consider the size of the cold water circulation, whether the temperature formed by the blockage of the circulating water pump is too high, and sweep it one by one. The sulfuric acid content should be regularly tested and made up for the sulfuric acid according to the daily consumption of sulfuric acid brought out and brought in by the oxidation tank. Time to keep within the process range (180-220g l optimal).

Generally speaking, if the temperature drops, the wear resistance of the anodized film of aluminum and aluminum alloy will increase, which is caused by the decrease in the dissolution rate of the electrolyte to the film, in order to obtain a higher hardness oxide film. We want to grasp the temperature in the range of 2 for hard anodizing as well.

Dear, hello, I am glad to answer for you, and the high aluminum powder can be used in this way.

1. The use of high alumina powder in lost foam coatings: 1. It is used for surface coatings and sand sprinklers for investment casting. 2. It can be used as a coating material for vacuum casting, V-method molding, ceramic mold casting and various sand casting.

2. High alumina powder has a small expansion coefficient, high refractoriness, good chemical and rolling stability, and can replace the most expensive corundum and zircon sand and powder. The use of high alumina powder improves the qualification rate of castings and reduces the cost of castings. 4. High-alumina powder selects high-alumina vanadium clinker, which is produced through washing, crushing, screening, magnetic separation, hydromagnetic separation, drying and other processes.

Summary. The material generally used to avoid powder on the surface of aluminum alloy is silane coupling agent. Silane coupling agent is a chemical substance that can form a protective film on the surface of aluminum alloy, which can prevent dust and dirt from adhering to the surface of aluminum alloy, and can also improve the corrosion resistance and wear resistance of aluminum alloy surface.

Silane coupling agent can be applied to the surface of aluminum alloy by spraying, dipping, brushing, etc., and it is necessary to pay attention to the operation specifications and safety measures when using.

The material generally used to avoid powder on the surface of aluminum alloy is silane coupling agent. Silane coupling agent is a chemical substance that can form a protective film on the surface of aluminum alloy, which can prevent dust and dirt from adhering to the silver surface of aluminum alloy scale, and can also improve the corrosion resistance and limb resistance of aluminum alloy surface. Silane coupling agent can be applied to the surface of aluminum alloy by spraying, dipping, brushing, etc., and it is necessary to pay attention to the operation specifications and safety measures when using.

I'm sorry I don't understand, but can you elaborate on that?

The material generally used to avoid powder on the surface of aluminum alloy is silane coupling agent. Silane coupling agent is a chemical substance that can form a protective film on the surface of aluminum alloy, which can prevent dust and dirt from adhering to the silver surface of aluminum alloy scale, and can also improve the corrosion resistance and limb resistance of aluminum alloy surface. Silane coupling agent can be applied to the surface of aluminum alloy by spraying, dipping, brushing, etc., and it is necessary to pay attention to the operation specifications and safety measures when using.