Relevance

Among other industries, one of the most important consumers of titanium is industrial chemistry. In terms of titanium alloys consumption it shares the leading positions with aerospace industry. It is not news that one of the main problems in chemical production is corrosion protection. Along with technological development and continuous growth of productivity, the costs of corrosion protection and replacement of equipment in case of failure are also increasing. Today, the most effective solution to such issues is the use of new corrosion-resistant materials.

Advantages of Titanium Alloys

Titanium alloys effectively replace alternative materials such as:
1. Nickel alloys (Halstelloy "B" and "C");
2. High alloyed steel, such as X23H28MDZT;
3. Stainless steels like X18H10T;
4. Rare and precious metals;
5. Non-ferrous metals (tantalum, platinum, tin, niobium, copper);
6. Plastics.

A comparative analysis of metals and alloys used in modern chemical equipment showed that titanium alloys ensure the maximum reduction of operating costs and increase the trouble-free operation. It became possible to simplify and improve designs. Labor-intensive and expensive lining work is eliminated. The only downside is the massive capital investment required to install titanium equipment.

The first use of titanium equipment showed that it is a valuable construction material for manufacturing basic equipment for the chemical and petrochemical industry. In 1954, Titanium Metals Corporation of America was the first company to use titanium to line a mixer that operated in a chlorine dioxide atmosphere, which caused rapid corrosion. Titanium equipment is produced in many countries, such as Bulgaria, France, Germany, Italy, Japan, Romania, United Kingdom, United States, etc.

Use

There are a number of industries where the use of titanium is practically no alternative. These are:

1. chlorine, chlorine dioxide and chloric acid;
2.Caustic;
3 Potassium, potassium chlorides, and potassium chlorates;
4. Sodium;
5. Magnesium;
6. Manganese;
7. Ammonium perchlorate;
8. Calcium hypochlorite;
9. Trichloroacetate;
10. Herbicides 2,4-D;
Lime chloride; 11;
Copper chloroxide; 12;
13. Ammonium chloride;
14. Carnallite;
15. Soda;
16. Bertholite salt;
17. Glauber salt;
18. Urea;
Nitric and sulfuric acid; 19;
20. Polychloroacetic acid; 20;
21. ethylbenzene;
22. Isopropylbenzene;
23. Organic glass;
24. Nitrosyl chloride, and melamine;
25. 2-3-dichloronaphthopon, 1,4-paraoxydiphy melamine;
26. Paranitroiniline, neozone D, isatin, chromolan;
27. Optically bleaching agents, polyethylene, and acetaldehyde;
28. Synthetic rubbers (chloronrepe, isoprepe);
29. Liquid thiocol, viscose fibers, and caprolactams;
30. Vinyl acetate;
31. Epoxy resin;
32. Pharmaceuticals such as: (gallic acid, iodine tincture, thyme extracts, digolene peo, water pepper, tannin, breast elixir, solutions for injection).

Chemical resistance

To date, there are more than 600 industrial products in which the chemical resistance of titanium has been well studied. In spite of this, corrosion testing is carried out when new technologies are used because compositions in the chemical industry tend to be multi-component. Therefore, even minor additives of any substance can fundamentally change the corrosion behavior of titanium. Mineral acid solutions and oxidizer additives have an inhibiting effect on titanium. It has been proven on numerous occasions that titanium parts do not corrode for 8 years in an environment containing sulfuric acid up to 200 g/l, where copper, nickel and iron salts are present, at a temperature of about 80 °C. Here's an example: a titanium pump can operate in a plant pumping 20% sulfuric acid at temperatures up to 90 °C, and will "eat" only 5mm of corrosion in a year. Similar pumps in production work for quite a long time in solutions with 5-15% of hydrochloric acid, containing an admixture of iron chloride and magnesium.

Titanium is very resistant to corrosion in wet chlorine and chlorine derivatives which can cause ulcerative corrosion and corrosion cracking, as well as in organic compounds containing oxygen, chlorine, and in most chloride solutions. This is why titanium is so widely used in the chemical industry to make equipment. However, there have been some anomalous occurrences where, in practice, titanium has succumbed to corrosion in chlorine and chloride solution. Corrosion often occurs where there are cracks, gaps, and crevices, very often it is in those places where the collector and electrolyzer are connected. In order to avoid such troubles, the equipment should be rationally constructed in order to keep the risk of corrosion to a minimum.

In contact with other metals

Titanium becomes a cathode, thus in an aggressive environment it increases the corrosion of other metal that has contact with it. Here's an example. Cr18Ni10T or Cr17GSM2T stainless steel plus brass or bronze. Often, such corrosion is ulcerous in nature, its development depends on the area of contact.

Grades of titanium

Among commercially available alloys the most frequently used grade is BT1-0. Exactly this grade has the best anti-corrosive properties at operating temperatures up to 350 °C. The AT-3 alloy is also actively used, which was developed in IMET AS USSR by I.I. Kornilov and collaborators. In most cases this alloy has higher corrosion resistance than other alloys (including BT1-0). This alloy also has higher antifriction properties. It is often recommended for use in environments containing acid - formic, sulfuric, hydrochloric, phosphoric even at boiling point. The alloy also has corrosion resistance in so called reducing environments which have an alkaline reaction. It has shown good promise in replacing nickel, platinum, and gold-based alloys. After studying the properties of alloys such as 4200 and 4201 and their industrial tests, they are recommended for use in the production of tetrachlorides and amino acids.

Buy, price

Company Evek GmbH sells rolled metal products at the best price. It is formed taking into account LME rates (Londonmetal exchange) and depends on the technological characteristics of production without including additional costs. We supply a wide range of products made of titanium and its alloys. All batches have quality certificate for compliance with standards requirements. With us you can buy in bulk the most various products for large-scale productions. The wide choice, exhaustive consulting of our managers, reasonable prices and timely delivery determine the face of our company. There is a system of discounts for wholesale purchases