Acceptance of hardware materials Hardware is divided into general hardware and special hardware according to the function. Ordinary hardware is divided into hinge rails, decorative handles, and decorative locks according to the setting method. Special hardware is divided into bathroom hardware and kitchen pendant according to the setting method. Hardware purchase tips (1) Joints, slides and locks with good sealing performance should be selected. It is flexible and convenient to open and close and pull several times during purchase. (2) It is advisable to choose a lock with good flexibility. When you purchase, you can insert the key a few times to see if it is not smooth, and whether the switch is screwed up is not cheap. (3) Select all kinds of decorative hardware with good appearance and performance. When purchasing, it is mainly to see if the appearance is defective, how the gloss is applied, and whether the hand feels smooth. (4) The weight of one hand is the same as that of the product, and the product with heavy weight is relatively good. Today, sliding doors have been increasingly used in everyday life. High-quality hardware is the "life" of sliding doors, but inferior products will give consumers unsatisfactory shortcomings. Here's a look at how to choose the sliding door hardware. (1) High-quality sliding door hardware is mainly reflected in the design and manufacturing level of its pulley system and the matching track design. The bearings used to manufacture the pulleys must be multi-layer composite structural bearings, the outermost layer is a high-strength wear-resistant nylon bushing, and the nylon surface must be very smooth and cannot have prismatic projections; the inner ball cage is also high-strength. The nylon structure reduces friction and enhances the lubrication performance of the bearing; the bearing structure of the bearing is steel structure, which can effectively reduce the noise during the sliding process of the pulley and can lubricate the pulley. (2) The track matched with the pulley is also crucial for the use of the sliding door. The track for the sliding door generally has two types of cold-rolled steel track and aluminum alloy track. Users generally think that the steel track is more durable than the aluminum alloy track, and the thicker the wall of the track, the better, but it is not entirely true. High-quality sliding door hardware is embodied in the perfect combination of track and pulley, rather than a simple part, so users should not pay attention to the thickness of the track wall. The track must be perfectly matched to the pulley, followed by the material problem. In general, imported materials should be superior to domestic materials. (3) It should not be confused by the coating on the surface of the aluminum alloy. Unreasonable plating can only destroy the smoothness of the track surface, so do not think that the deeper the plating on the track surface, the better, it may be counterproductive. Concerned about surprises Label: How to check hardware Previous: Common five kinds of metal casting defects preventive measures Next: Purchase hardware accessories to be heavy quality
Acids exist universally in our life. There are both numerous kinds of natural ACID compounds with biological functions and massive synthesized acids which are used in many ways.
In industry
Acids are fundamental reagents in treating almost all processes in today's industry. In the chemical industry, acids react in neutralization reactions to produce salts. For example, nitric acid reacts with ammonia to produce ammonium nitrate, a fertilizer. Additionally, carboxylic acids can be esterified with alcohols, to produce esters. Acids are often used to remove rust and other corrosion from metals in a process known as pickling. They may be used as an electrolyte in a wet cell battery, such as sulfuric acid in a car battery.
In food
Many acids can be found in various kinds of food as additives, as they alter their taste and serve as preservatives. Phosphoric acid, for example, is a component of cola drinks. Acetic Acid is used in day-to-day life as vinegar. Citric Acid is used as a preservative in sauces and pickles. Certain acids are used as drugs. Acetylsalicylic acid (Aspirin) is used as a pain killer and for bringing down fevers.
Acid catalysis
Acids are used as catalysts in industrial and organic chemistry; for example, sulfuric acid is used in very large quantities in the alkylation process to produce gasoline. Some acids, such as sulfuric, phosphoric, and hydrochloric acids, also effect dehydration and condensation reactions. In biochemistry, many enzymes employ acid catalysis.
ACID Ethanedioic Acid,Anhydrous Oxalic Acid,Acetic Acid 98.5%,Acid Industry Grade Yucheng Jinhe Industrial Co.,Ltd , https://www.jinhetec.com