Fenghe was founded in 2007

Hotel luggage car cleaning method

by:Fenghe     2020-05-16

There are a lot of luggage carts in the hotel. The luggage carts are used by guests in the lobby and room service staff. Hotel luggage carts that we usually see are always clean and spotless. What exactly did they do to maintain them so well? These hotel luggage car cleaning methods leave nowhere to hide dirt. 


1. Dust The production is often carried out in a dusty place. There are often many dusts in the air, and they constantly fall on the surface of the equipment. They can be removed with water or alkaline solutions. However, adherent dust requires high-pressure water or steam to clean it. 


2. Floating iron powder or embedded iron On any surface, free iron will rust and corrode stainless steel. Therefore, it must be cleared. Floating powder can generally be removed with the dust. Some have strong adhesion and must be treated with embedded iron. In addition to dust, there are many sources of surface iron, including cleaning with ordinary carbon steel wire brushes and shot blasting with sand, glass beads or other abrasives previously used on ordinary carbon steel, low alloy steel or cast iron parts, or Repair the non-stainless steel products mentioned above near the stainless steel parts and equipment. If protective measures are not taken for stainless steel during cutting or lifting, the steel wire rope, spreader and iron on the work surface are easily embedded or stained on the surface. 


3. Scratches In order to prevent the accumulation of process lubricants or products and / or dirt, scratches and other rough surfaces must be mechanically cleaned (eg dry blasting, abrasive glass beads). 


4. Hot tempering color and other oxide layers If the stainless steel is heated to a certain high temperature in the air during welding or grinding, chromium oxide thermal tempering colors will appear on both sides of the weld, the lower surface and the bottom of the weld. The thermal tempering color is thinner than the oxidation protective film, and it is clearly visible. The color depends on the thickness, and can be seen in rainbow, blue, purple to light yellow and brown. Thicker oxides are generally black. It is caused by staying at a high temperature or for a long time at a higher level. When any of these oxide layers appears, the chromium content on the metal surface will decrease, resulting in reduced corrosion resistance in these areas. In this case, not only the thermal tempering color and other oxide layers should be eliminated, but also the chromium-depleted metal layer under them should be cleaned.


5. Rust spots Before or during the production process, rust is sometimes seen on stainless steel products or equipment, which indicates that the surface is seriously polluted. The rust must be removed before the equipment is put into use, and the thoroughly cleaned surface should be inspected by iron test and / or water test. 


6. Rough grinding and machining Grinding and machining can cause rough surfaces, leaving grooves, overlaps and burrs. Each defect may also damage the metal surface to a certain depth, so that the damaged metal surface cannot be removed by pickling, electro-polishing or shot blasting (such as dry sandblasting, glass beads for abrasives). Rough surfaces can be the birthplace of corrosion and deposition products. Cleaning the weld defects before re-welding or removing excess weld reinforcement height can not be ground by rough grinding. In the latter case, it should be ground again with fine abrasives. 


7. Welding arc marks When the welder starts the arc on the metal surface, it will cause rough surface defects. The protective film is damaged, leaving a potential source of corrosion. The welder should start the arc on the weld bead or on the side of the weld joint. Then melt the arc trace into the weld. Hotel baggage car cleaning method makes dirt nowhere to hide. 


8. Welding spatter Welding spatter has a great relationship with the welding process. For example: GTAM (gas shielded tungsten arc welding) or TIG (inert gas shielded tungsten arc welding) has no spatter. However, when using GMAW (gas shielded metal arc welding) and FCAW (arc welding with flux core) two welding processes, improper use of welding parameters will cause a lot of spatter. When this happens, the parameters must be adjusted. If you want to solve the problem of welding spatter, you should apply anti-splash agent on each side of the joint before welding, so as to eliminate the adhesion of the spatter. After welding, the anti-splash agent and various spatters can be easily cleaned away, without damaging the surface or causing slight damage.


9. Flux The welding process using flux includes manual welding, arc welding with flux core and submerged arc welding. These welding processes will leave small flux particles on the surface, which cannot be removed by ordinary cleaning methods. This particle will be the source of corrosion of crevice corrosion, and these residual fluxes must be removed by mechanical cleaning. 


10. Welding defects Welding defects such as undercuts, under-penetration, dense pores and cracks not only reduce the firmness of the joint, but also become a source of corrosion of crevice corrosion. When cleaning up to improve this result, they can also entrain solid particles. These defects can be repaired by re-welding or re-welding after grinding. 


11. Oil and grease Organic substances such as oil, grease and even fingerprints can become a source of local corrosion. Since these substances can act as a barrier, they will affect the chemical and electrochemical cleaning effect, so they must be cleaned up completely. ASTM A380 has a simple water break test to detect organic pollutants. During the test, water is poured from the top of the vertical surface, and the water will separate along the periphery of the organic matter during the downward flow. Fluxes and / or acidic chemical cleaners can remove oil stains and grease. 


12. Residual adhesive When the tape and protective paper are removed, a part of the adhesive always remains on the stainless steel surface. If the adhesive is not hard enough, it can be removed with an organic flux. However, when exposed to light and / or air, the tackifier hardens, forming a corrosion source of crevice corrosion. Then it needs mechanical cleaning with fine abrasives. 


13. Paint, chalk and marking pen marks The effects of these pollutants are similar to the effects of oil and grease. It is recommended to use a clean brush and clean water or alkaline cleaning agent for washing. You can also use high-pressure water or steam to wash. The hotel is superb, and there are ways to deal with any dirt. Although the luggage cart is unremarkable, it is necessary to keep it clean and bright, otherwise guests will see dirt, and I do n’t want to come to this hotel again.  


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