Door hardware locks to buy a road lock selection points

The daily use of hardware lock materials is complicated, the processing technology is diverse, and the specifications are not the same. How to choose the hardware lock on the door? I sorted out the purchase points for this, and explained how to choose the hardware locks.

A look at the lock material

The lock material on the market is basically divided into stainless steel, copper and zinc alloy. High-strength stainless steel, strong corrosion resistance, no discoloration, is the best lock material; copper is more versatile, mechanical properties are superior, and the price is higher; the lock high-quality zinc alloy is strong and wear-resistant, corrosion-resistant, and easy to form. Mostly used for mid-range locks.

Second, look at the surface treatment of the lock

The surface treatment is roughly divided into electroplating, spraying and coloring. The locks form a dense protective film on the surface of the product through surface treatment, which acts as anti-corrosion and anti-rust, making the lock more beautiful and durable. The dense protective film is also a standard for measuring the quality of locks. The locks of good quality are mostly plated, the coating is fine and smooth, even and moderate, the color is bright, and there are no signs of bubbles, rust and oxidation.

Third, see the lock implementation standards

Foreign countries have very strict standards for hardware locks, so the quality of imported products is relatively high. We can feel the quality of the locks. Generally speaking, the heavy lock has a relatively high quality; the lock body can not be pointed, and the tip is easy to injure, especially the lock handle end, the lock tongue and the lock body are three positions; the lock spring is good. Flexible opening, high sensitivity and long service life. There are also many styles of locks, so be sure to keep in mind the style of the interior doors.

Editor in charge: Xu Yuehua

Product description
Product name: choline chloride
Alias: Chlorinated Cholesterol; 2-hydroxyethyl trimethylammonium chloride; augmenter
English name: Choline Chloride, alias: 2-hydroxy-yethyl dimethyl ammonium chloride; 2-hydroxy-N, N, N-trimethylmethylethanaminium Chloride; 2-hydroxy-N, N, N-trimethylethanaminium chloride hydrochloride
Cas No: 67-48-1
Structure: HOCH2CH2N (CH3)3Cl
Molecular Formula: C5H14ClNO
Molecular weight: 139.63 content (%) : 98.5%-100.5%
PERFORMANCE STANDARDS: Enterprise Standards

Physical Properties: White crystalline powder, with strong hygroscopicity, slightly fishy.

choline chloride

Product application: Choline is a form of vitamin B. Choline can promote the liver, kidney fat metabolism, Choline is the basis of the body's synthesis of Acetylcholine, thus affecting the transmission of nerve signals. Choline is also one of the methyl sources needed for methionine synthesis in Vivo. Natural Choline is found in many foods, but not in concentrations sufficient to meet the rapid growth requirements of the modern feed industry. Therefore, synthetic choline should be added to feed to meet its needs. Lack of choline can lead to fatty liver, slow growth, egg production rate decreased, increased mortality and other phenomena. Choline chloride is also a kind of plant photosynthesis promoter, to increase the yield has obvious effect. Spraying at booting stage of wheat and rice can promote spikelet differentiation and multiple-bearing grains. Spraying at filling stage can accelerate grain filling speed, plump grains and increase 1000-grain weight by 2-5 grams. It can also be used to increase the yield of corn, sugar cane, sweet potato, potato, radish, onion, cotton, tobacco, vegetable, grape, mango, etc. In the early stage of swelling, the root tubers and other underground crops were treated with 60% water 10 ~ 20 ML (6 ~ 12 g) per mu, diluted with 30 l water (1500 ~ 3000 times) and sprayed with 2-l-3 times Ornamental plants such as Rhododendron, Poinsettia, Geranium, hibiscus regulate growth; wheat, barley, oat lodging resistance.

Choline Chloride CAS No.67-48-1

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Jinan Forever Chemical Co., Ltd. , https://www.jinanforever.com