Instruct: Given a question, retrieve relevant documents that can help answer the question.
Query: Do you wash cast iron with soap and water?
Because other cookware cleaning techniques like scouring or washing in a dishwasher can remove or damage the seasoning on a bare cast-iron pan, these pans should not be cleaned like most other cookware. Some chefs advocate never cleaning cast-iron pans at all; simply wiping them out after use, or washing them with hot water and a stiff brush. Others advocate washing with mild soap and water, and then re-applying a thin layer of fat or oil. A third approach is to scrub with coarse salt and a paper towel or clean rag.
Clothes were washed manually, by rubbing and sometimes striking them against a hard surface with soap. The aim was to do penetrate the mix of water and soap between the fibres of the fabric to pull-out the dirt. The slabs to wash the clothes were slabs of natural stone chosen to present a fine and relatively flat surface. The small rounded irregularities could help of friction in the washing process.
Malleable iron starts as a white iron casting that is then heat treated for a day or two at about and then cooled over a day or two. As a result, the carbon in iron carbide transforms into graphite and ferrite plus carbon (austenite). The slow process allows the surface tension to form the graphite into spheroidal particles rather than flakes. Due to their lower aspect ratio, the spheroids are relatively short and far from one another, and have a lower cross section vis-a-vis a propagating crack or phonon. They also have blunt boundaries, as opposed to flakes, which alleviates the stress concentration problems found in grey cast iron. In general, the properties of malleable cast iron are more like those of mild steel. There is a limit to how large a part can be cast in malleable iron, as it is made from white cast iron.
Stainless steel is considered stainless because it has at least 11% chromium by mass. Chromium is a relatively inert metal and does not rust or react as easily as plain carbon steel. This is what makes it an exceptional material for cooking. It is also fairly inexpensive, but does not have a very high thermal conductivity. From a surface standpoint, this is because of the thin layer of chromium oxide that is formed on the surface. This thin layer protects the metal from rusting or corroding. While it is protective, the oxide layer is not very conductive, which makes cooking food less efficient than it could be. For most cooking applications, high thermal conductivity is desirable to create an evenly heated surface on which to cook. In this way, stainless steel is usually not considered high-grade cookware.
The temperature required to forge weld is typically 50 to 90 percent of the melting temperature. Iron can be welded when it surpasses the critical temperature (the A temperature) where its allotrope changes from gamma iron (face-centered cubic) to delta iron (body-centered cubic). Since the critical temperatures are affected by alloying agents like carbon, steel welds at a lower temperature-range than iron. As the carbon content in the steel increases, the welding temperature-range decreases in a linear fashion. Iron, different steels, and even cast-iron can be welded to each other, provided that their carbon content is close enough that the welding ranges overlap. Pure iron can be welded when nearly white hot; between and . Steel with a carbon content of 2.0% can be welded when orangish-yellow, between and . Common steel, between 0.2 and 0.8% carbon, is typically welded at a bright yellow heat.
Horses can be bathed by being wet down with a garden hose or by being sponged off with water from a bucket. Horses do not require bathing and many horses live their entire lives without a bath. However, horses are often hosed off with water after a heavy workout as part of the cooling down process, and are often given baths prior to a horse show to remove every possible speck of dirt. They must be trained to accept bathing, as a hose and running water are unfamiliar objects and initially may frighten a horse. A hose is usually used for bathing. Start near the legs, being careful to point the hose at a downward angle. When spraying the body, be sure to angle the hose so that water doesn't hit the horse in the face. Either horse or human shampoo may be safely used on a horse, if thoroughly rinsed out, and cream rinses or hair conditioners, similar to those used by humans, are often used on show horses. Too-frequent shampooing can strip the hair coat of natural oils and cause it to dry out. Though horses in heavy work, such as racehorses, may be rinsed off after their daily workout, it is generally not advisable to shampoo a horse more than once a week, even in the show season. A well-groomed, clean horse can be kept clean by wearing a horse blanket or horse sheet.
The lowest temperature at which a plain carbon steel can begin to melt, its solidus, is . Steel never turns into a liquid below this temperature. Pure Iron ('Steel' with 0% Carbon) starts to melt at , and is completely liquid upon reaching . Steel with 2.1% Carbon by weight begins melting at , and is completely molten upon reaching . 'Steel' with more than 2.1% Carbon is no longer Steel, but is known as Cast iron.
Stainless steels have a long history of application in contact with water due to their excellent corrosion resistance. Applications include a range of conditions from plumbing, potable and waste water treatment to desalination. Types 304 and 316 stainless steels are standard materials of construction in contact with water. However, with increasing chloride contents higher alloyed stainless steels such as Type 2205 and super austenitic and super duplex stainless steels are utilized.
Food uses of sodium hydroxide include washing or chemical peeling of fruits and vegetables, chocolate and cocoa processing, caramel coloring production, poultry scalding, soft drink processing, and thickening ice cream. Olives are often soaked in sodium hydroxide for softening; Pretzels and German lye rolls are glazed with a sodium hydroxide solution before baking to make them crisp. Owing to the difficulty in obtaining food grade sodium hydroxide in small quantities for home use, sodium carbonate is often used in place of sodium hydroxide. It is known as E number E524.
The term "asbestos ware" refers to vessels containing 90% asbestos and 10% clay. Asbestos ware can resist heat up to 900–1000 °C. The clay made shaping of the vessel possible, but the high amount of asbestos does not classify it as pottery in a formal sense. It is believed that the asbestos ware was used in iron production such as spearheads, arrowheads and artefacts. The vessel is also drilled with many holes. The fact that the reduction of iron ore (FeO) with abundant carbon generates large amounts of carbon monoxide (CO) may suggest that the drilled holes were used to increase the influx of air (oxygen) required for proper glowing process. Iron ore is abundant in lakes e.g. in Finland.
Certain types of fabrics need to be re-treated to maintain water-repellency, as fluoropolymers decompose over time when exposed to water and chemicals. Washing the garment with harsh detergents usually accelerates DWR loss; in addition, soaps often leave a residue which attracts water and dirt. On the other hand, rain water or salt water affects DWRs less significantly. Affected garments can be treated with a 'spray-on' or 'wash-in' treatment to improve water-repellency. In some cases heat treatment can reactivate the factory applied repellent finish and aid in the repelling of water, and other liquids such as oils. On the other hand, some DWR products do not require heat treatment to be activated, and sometimes DWR treatments can be revitalized simply by washing the fabric with a suitable cleaner.
Vacuum your whole entire house especially where you think the infestation is. Throw away any items that are already infested. Wash all your clothing and fabrics with soap and hot water. If you want, you can go the extra length by steam cleaning your furniture and carpentry.
Huntsman revolutionised the technology of steel making through his invention "cast" or "crucible steel". Whilst in Handsworth, he developed the process whereby it became possible to melt down raw or "blister steel" and produce cast ingots of steel. This required an extremely high temperature of 1,600 degrees Celsius, something which had never been achieved before in the steel industry. In order to produce and sustain such a high temperature in his furnace, Huntsman used coke instead of charcoal. To contain the steel he designed a clay crucible which could withstand the severe temperature and possible attack of the metal.
The Paradise Cleanseat Power by CWS can be installed on standard toilets with access to power supply and water connection. The cleaning process is executed repeatedly after each use by a sensor or automatically (triggered by flush). The hygiene lock extends out and positions itself on the seat, sprays fresh tap water and the CWS cleaning liquid onto the surface of the toilet seat, which then completely rotates around its axis one time. The wiper made of a highly flexible specialised synthetic material removes any dirt, germs, water and cleaning liquid from the seat surface without leaving any residue. The cleaning process takes approx. 15 seconds, than the hygiene lock retracts to its initial position. It was first introduced in 1993 is manufactured in Switzerland.
Machine tools filled a need created by textile machinery during the Industrial Revolution in England in the middle to late 1700s. Until that time machinery was made mostly from wood, often including gearing and shafts. The increase in mechanization required more metal parts, which were usually made of cast iron or wrought iron. Cast iron could be cast in molds for larger parts, such as engine cylinders and gears, but was difficult to work with a file and could not be hammered. Red hot wrought iron could be hammered into shapes. Room temperature wrought iron was worked with a file and chisel and could be made into gears and other complex parts; however, hand working lacked precision and was a slow and expensive process.
The E. G. Budd Company of Philadelphia recognized the important metallurgical characteristics of 18/8 stainless steel (known today as SAE 304 austenitic stainless steel) and developed a spot welding process to take advantage of the oxidized layer on the surface of stainless steel. Heat treating the 18-8 stainless steel leaves the metal with non-magnetic and ductile properties. Repeatedly reheating the metal to 1000–1100 °C impairs the mechanical and chemical properties of the metal. The metal becomes susceptible to corrosion due to carbide precipitation, and loses fatigue resistance. The important factor in controlling the metal's properties is the dwell time at those temperatures. Using a controlled time element and recorder, a power supply with smooth current, and very brief high currents, a satisfactory spot weld may be produced.
Many studies have shown that painting is what generates almost half dangerous waste at a shipyard due to using high-pressure equipment to wash or remove any unwanted material that is on it like rust. Which will eventually make its way to the water and creates water pollution to the environment. Once these have compromised the surface of the hull the ship must go to the shipyard for maintenance. In a study in 2011 samples of sediments were collected from two sites in coastal marine area of Yongho Bay, one from the shipyard yard and the other 500m away. These results had analyzed that both samples contained metals that included Al, Fe, Li, V, Cr, Mn, Ni, Cu, Zn, As, Cd, Sn, and Pb. In addition, it had been confirmed that the concentration was higher in the first sample that was by the shipyard then the sample taking 500m away and was due to paint fragments applied to the steel ship hulls.
At elevated temperatures all metals react with hot gases. The most common high temperature gaseous mixture is air, and oxygen is the most reactive component of air. Carbon steel is limited to ~ in air. Chromium in stainless steel reacts with oxygen to form a chromium oxide scale which reduces oxygen diffusion into the material. The minimum 10.5% chromium in stainless steels provides resistance to ~, while 26% chromium provides resistance up to ~. Type 304, the most common grade of stainless steel with 18% chromium is resistant to ~. Other gases such as sulfur dioxide, hydrogen sulfide, carbon monoxide, chlorine, etc. also attack stainless steel. Resistance to other gases is dependent on the type of gas, the temperature and the alloying content of the stainless steel.
Oakum can be used to seal cast iron pipe drains. After setting the pipes together, workers pack oakum into the joints, then pour molten lead into the joint to create a permanent seal. The oakum swells and seals the joint, the "tar" in the oakum prevents rot, and the lead keeps the joint physically tight.
Today, modern methods, such as rubber seals (for example, gaskets or o-rings) are more common.
Magnesium is sold in stores in shaved or bar form. Shavings burn white-hot, are impossible to smother with carbon dioxide or sand, and can ignite even wet kindling. Solid bars are impossible to ignite under normal conditions (and difficult even with a welding torch), and are thus very safe to carry. Magnesium powder and shavings are pyrophoric (they oxidise rapidly when exposed to the air). It is dangerous to carry pre-shaved magnesium — at best, it loses potency, at worst, it can spontaneously ignite and is then nearly unquenchable. Magnesium bars are sometimes sold with a length of ferrocerium cast into one edge.
"Spaces with Iron", created in 1972, is made of cast iron and bronze. It measures high, wide, and long. The work consists of two open rectangular pieces. One elongated rectangle is cast in bronze; the other piece, almost square, is cast iron. The cast-iron rectangle is taller than the bronze piece, but the bronze piece is wider. Both forms sit upright, parallel to each other, and are connected with an iron piece resting across the bottom of each piece. The sculpture sits on a cylindrical-shaped concrete base. A bronze rectangular cuboid rests on each rectangular piece on the sculpture's proper left side. The edges of both cuboids extend beyond the sides of the rectangular pieces.
In developing countries, hand washing with soap is recognized as a cost-effective, essential tool for achieving good health, and even good nutrition. However, a lack of reliable water supply, soap or hand washing facilities in people's homes, at schools and at the workplace make it a challenge to achieve universal hand washing behaviors. For example, in most of rural Africa hand washing taps close to every private or public toilet are scarce, even though cheap options exist to build hand washing stations. However, low hand washing rates rather can also be the result of engrained habits rather than due to a lack of soap or water.
Iron is more prone to rusting than (tinned) copper. Cast iron kitchen utensils, in particular, are however less prone to rust if, instead of being scoured to a shine after use, they are simply washed with detergent and water and wiped clean with a cloth, allowing the utensil to form a coat of (already corroded iron and other) material that then acts to prevent further corrosion (a process known as seasoning). Furthermore, if an iron utensil is solely used for frying or cooking with fat or oil, corrosion can be reduced by never heating water with it, never using it to cook with water, and when washing it with water to dry it immediately afterwards, removing all water. Since oil and water are immiscible, since oils and fats are more covalent compounds, and since it is ionic compounds such as water that promote corrosion, eliminating as much contact with water reduces corrosion. For some iron kitchen utensils, water is a particular problem, since it is very difficult to dry them fully. In particular, iron egg-beaters or ice cream freezers are tricky to dry, and the consequent rust if left wet will roughen them and possibly clog them completely. When storing iron utensils for long periods, van Rensselaer recommended coating them in non-salted (since salt is also an ionic compound) fat or paraffin.
As with other cast iron vessels, a seasoned pan or dutch oven should not regularly be used to cook foods containing tomatoes, vinegar or other acidic ingredients, as these foods will eventually remove the protective layer created during the seasoning process. Cast iron ovens are best suited to cook food high in oil or fat, such as chicken, bacon, or sausage, or used for deep frying. Subsequent cleanings are usually accomplished without the use of soap. Detergent soaps and dishwashers can remove the seasoning on cast iron, so some cookbook authors recommend only wiping the pans clean after each use, or using other cleaning methods such as a salt scrub or boiling water. The protective layer itself is polymeric and not very susceptible to soaps, and many users do briefly use detergents and soaps. However, cast iron is very prone to rust, and the protective layer may have pinholes, so soaking for long periods is contraindicated as the layer may start to flake off.
Removal of soap and water from the clothing after washing was a separate process. First, soap would be rinsed out with clear water. After rinsing, the soaking wet clothing would be formed into a roll and twisted by hand to extract water. The entire process often occupied an entire day of hard work, plus drying and ironing.