1. After a long period of analysis, there is a decrease in bubbles in the sulfur absorption cup or a drop in the flowmeter float in the arc furnace. Cause: There are too many dust in the electric arc furnace and it has been blocked. Need to clean the dust in the furnace, dust collector, single tube. When dusting, be careful not to break the dust-absorbing paper wrapped around the duster core. For specific methods, see the electric arc furnace instructions. 2. When measuring carbon, the measured data is lower than the actual value. Causes (1): Soda lime is too long (solid absorption). Remedy: Remove the absorption tube at the back of the instrument and replace it with fresh and dry soda lime. If the liquid is absorbed, the KOH solution in the gas bottle is too long and should be replaced. Cause (2): Pipe leaks. Silicone seals at the scorpion seats do not seal, and the gas pipes at the back of the gas analyzer analysis box leak air. The inspection method can be performed according to the "nine" directory. Causes (3) The sample burns incompletely. Remedy: Check the arc combustion system or properly add pure iron as auxiliary solvent to help combustion to achieve full and complete. 3, the solution sucks in the gas in the analysis process Cause: The two electrodes DJ1, DJ2 in the instrument level bottle have been corroded. Remedy: Clean the electrode surface with iron sandpaper. 4. After the "Government" is over, the liquid level in the gas cylinder drops continuously. Cause: The air path above the gas cylinder includes air leaks from the pipes connecting DF3, DF4, absorption pipes, and DF5. However, the air leakage at the dry pipe rubber plug is more likely. Remedy; Connect the appropriate connector. 5. After pressing the "Analyze" button, the bubble passes through the sulfur absorption cup, but the process is no longer down. Cause: Under normal circumstances DJ1 and DJ2 are in contact. Remedy: Turn DJ1 or DJ2 out of contact. Or dial the level rubber plug, bend the electrode properly, and then install it. 6. After the “Prepare†button is pressed, the solution in the level bottle cannot be filled into the gas cylinder. (The liquid in the gas cylinder does not rise) Cause: Generally DJ3, DJ5 collide with or touch the inner wall of the cylinder. Remedy: Adjust DJ3, DJ5. Or the rubber stopper on the bottle is not tight or loose. 7. After the “Prepare†button is pressed, the titrant bottle does not add titrant to the buret. Cause: Generally, DJ3 and DJ5 collide with each other or come into contact with the inner wall of the burette. The exclusion method is 3 or DJ5. Or the rubber stopper on the titration bottle is tight or loose. 8. After the “Prepare†button is pressed, the liquid in the gas cylinder does not stop after it is full. Cause: The electrodes DJ3, DJ5 have been corroded. Remedy: Clear the electrode surface with iron sandpaper.
Black coating is a type of Surface Treatment used to provide a durable, aesthetic and protective finish to metal parts. It is applied to a range of substrates, including steel, aluminum, and titanium, through various processes such as painting, chemical baths or physical deposition.
Black coating provides an attractive, matte finish that reduces glare and reflections. It is commonly used in industries such as automotive, aerospace, and firearms, where aesthetics and durability are essential. The black coating can also be used for functional purposes, such as to reduce friction and wear.
One of the most common types of black coating is black oxide. Black oxide is created through a controlled chemical reaction that forms a layer of black iron oxide on the surface of the metal. This process enhances the corrosion resistance of the substrate and provides a uniform and attractive black finish. Black oxide is also used to provide a matte black finish to gun parts, as well as to increase the conductivity of electrical components.
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Finally, black coating can also be achieved through physical vapor deposition (PVD). This involves depositing a thin layer of black material onto the substrate through a vacuum chamber. PVD black coatings are very durable, and are often used in high-precision applications such as medical instruments and aerospace components.
In conclusion, black coating is a versatile and effective way to provide a durable, aesthetic, and protective finish to metal parts. Its visual appeal, corrosion resistance, and wear resistance make it a popular choice in a variety of industries and applications. Whether applied through chemical baths or physical vapor deposition, black coating plays an important role in enhancing the performance and longevity of metal parts.
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Carbon and sulfur analysis instrument maintenance methods and maintenance knowledge