Titanium Foil: An Unsung Core Material for Hydrogen Energy and Solid-State Batteries

The hydrogen energy industry and the solid-state battery sector are driving rapid growth in the demand for high-end titanium foil. While much attention is often focused on catalysts, membrane materials, and cell formulations, it is easy to overlook the humble, thin sheet of titanium foil—a foundational substrate essential for the stable operation of electrochemical reactions.

In proton exchange membrane (PEM) hydrogen fuel cells, **metallic bipolar plates serve as core structural components**. They are responsible for distributing hydrogen and air, conducting electrical current, and withstanding an acidic, humid environment at temperatures of 60–80°C. Traditional stainless-steel bipolar plates are prone to gradual corrosion, releasing metal ions that contaminate the membrane-electrode assembly and significantly shorten the fuel cell stack's lifespan. In contrast, bipolar plates stamped from ultra-thin titanium foil feature a natural passivation layer that provides corrosion resistance. They are also lighter in weight; when subjected to surface modification, they achieve the necessary electrical conductivity and greatly enhance the durability of the fuel cell stack. This has become a mainstream approach for high-power, long-life fuel cells, with industry standards typically centering on 0.1–0.15 mm titanium foil coils—materials that demand rigorous precision in terms of formability and surface uniformity. Gr7 Ti-0.2Pd Titanium Foil

Titanium foil is equally indispensable for hydrogen production via water electrolysis. Whether in alkaline electrolyzers or PEM electrolyzers, the anode substrate is constantly exposed to highly oxidizing media. Titanium foil acts as an electrode substrate that supports the catalyst without dissolving, making it a critical consumable for large-scale "green hydrogen" projects.

In the realm of solid-state batteries, titanium foil is also opening up new possibilities. In solid-state systems, the copper and aluminum foils used in conventional lithium-ion batteries can suffer from oxidation and interfacial instability, especially at high potentials. Titanium foil, with its superior chemical stability, can serve as a current collector or a protective barrier layer. It is well-suited for high-voltage solid-state cells, helping to improve both battery safety and cycle life. Currently, numerous research and development initiatives—spanning academia and industry—are actively validating the use of micron-scale, ultra-thin titanium foil. titanium alloy foil 

Naturally, scaling up production still presents challenges:

The first is cost. The use of titanium raw materials, vacuum annealing, and multi-roll precision rolling results in manufacturing costs significantly higher than those of copper or stainless steel foils, which has limited its widespread adoption.

Second, there is the challenge of processing. Techniques such as stamping, welding, and surface coating for titanium foil involve high technical thresholds, and the corresponding downstream processing methods are still undergoing continuous iteration.

Third, regarding the supply structure: the availability of high-end, ultra-thin, wide-format, and high-surface-quality titanium foil was previously limited. However, in recent years, domestic titanium producers have achieved continuous breakthroughs, rapidly enhancing both the production capacity and quality of domestically manufactured precision titanium foil—thereby laying the groundwork for cost reduction in domestic new-energy equipment.

In the long term, while titanium foil is unlikely to displace copper or aluminum foil as the mainstream material in consumer-grade lithium-ion batteries, it represents a key avenue for material advancement within high-value-added sectors—specifically **green hydrogen, high-power fuel cells, specialized solid-state batteries, and electrochemical equipment**. As the industry increasingly demands longer lifespans, enhanced safety, and the ability to withstand more rigorous electrochemical environments, the value of this micron-scale metallic film—titanium foil—will continue to be realized.

Titanium Wire For Aerospace Fasteners Manufacturers, Suppliers, Factory - HST TITANIUM

Titanium Wire For Aerospace Fasteners Manufacturers, Suppliers, Factory - HST TITANIUM: titanium wire for aerospace fasteners has excellent high-temperature resistance, corrosion resistance, and high-strength properties, and can ensure structural stability and long-term reliability in extreme environments.

Applications of Titanium Equipment in the Petroleum Industry

Urea serves not only as a high-quality fertilizer but also as a raw material for the petrochemical industry. Since the commissioning of the first titanium-lined urea synthesis tower in 1963, nearly 10,000 such units are currently in operation worldwide. Practical experience has demonstrated that these titanium-lined synthesis towers exhibit no significant corrosion. In contrast, the calculated corrosion rate for 316L stainless steel stands at 4.1–4.5 mm/a. Consequently, titanium offers superior economic benefits compared to stainless steel. In addition to titanium-lined urea synthesis towers, domestic facilities have—since the 1970s—successively adopted titanium-based equipment such as CO2 stripping towers, heat exchangers, mixers, pumps, and valves.

Titanium equipment is ideally suited for the refining of crude oil characterized by high sulfur and salt content. Internationally, titanium equipment has been successfully employed for many years across numerous processes, including atmospheric distillation units, wastewater treatment facilities, condensers for desulfurization separation towers, and radiators for stripping towers. In this same sector, my country has also adopted cast titanium seawater pumps, titanium condensers for catalytic cracking fractionation, titanium condensers for deep cryogenic separation, and porous titanium plates; all of these components have been operating normally for over a decade. Grade 5 Ti-6Al-4V Titanium Bar / Ti 6Al-2Sn-4Zr-6Mo Titanium Rod / Titanium Clad Copper Pipe

Chlorinated hydrocarbons constitute a common class of compounds utilized in the petrochemical industry. Given that these processes involve chlorination reactions, stainless steel equipment often proves inadequate for the task. Abroad, titanium has long been employed in the manufacture of equipment such as dichloromethane distillation towers, trichloroethane heat exchangers, condensation and fractionation towers, trichloroethylene condensation towers, tetrachloroethylene heat exchangers, and polychlorinated coil heaters. In my country's vinyl chloride production sector, a Ti-0.2Pd alloy lining has been applied to the tray support frames, nozzles, and flange sealing faces of cooling towers, wastewater stripping towers, and wastewater storage tanks; these components have been in service for nearly a decade with no signs of corrosion. Furthermore, titanium piping, fittings, and gas distributors have been standard materials of choice in these applications for many years.

Phenol is a vital raw material in the petrochemical industry. A novel process for extracting phenol and acetone—utilizing propylene and benzene as feedstocks via intermediates such as cumene and cumene hydroperoxide—has emerged in recent years. While titanium equipment was adopted for this process internationally over a decade ago, the corresponding technology remains under development within my country. In traditional processes for the production of phenol from alkaline benzenesulfonate solutions, titanium reactors, titanium coil coolers, titanium-nitrided agitator shaft sleeves, and titanium targets are employed.

Titanium Evaporators

The oxidation of acetaldehyde to produce acetic acid is a widely adopted industrial process in my country. Currently, titanium is utilized in high-boiling reboilers, primary acetic acid column reboilers, and condenser-coolers. Internationally, titanium equipment is extensively used in rectification, fractionation, and distillation columns. This is particularly advantageous in processes involving the oxidation of lower alkanes to acetic acid; in such cases—where numerous byproducts are generated and formic acid concentrations can reach as high as 8%, resulting in highly corrosive conditions—the substitution of stainless steel with titanium yields highly satisfactory results.

What are the technical requirements for titanium rods?

Titanium rods possess excellent physical and chemical properties, low density, light weight, non-magnetic properties, high strength, and excellent corrosion resistance. They also exhibit good mechanical and weldability. Baoji titanium rods are widely used in chemical equipment, seawater desalination, ship parts, electroplating, and other industries. Titanium's corrosion resistance is 10 times that of ordinary stainless steel, and titanium metal has a relatively low rejection rate by the human body. Therefore, medical titanium rods are widely used in implants and medical devices. forging titanium round bar / grade 5 titanium round rod / titanium round rod

Technical Requirements:

1. The chemical composition of titanium and titanium alloy rods should comply with GB/T 3620.1. During re-inspection by the buyer, the permissible deviation of the chemical composition should comply with GB/T 3620.2.

2. The diameter or side length of hot-worked rods and their permissible deviations should comply with the provisions of Table 1.

3. The permissible deviation of the diameter of hot-worked (ground) rods and cold-rolled/cold-drawn rods should comply with the provisions of Table 2.

4. The out-of-roundness of hot-worked (machined/ground) bars should not exceed half of their dimensional tolerance.

5. The unspecified length of machined bars is 300-6000 mm, and the unspecified length of annealed bars is 300-2000 mm. Fixed or multiple lengths should fall within the unspecified length range.

Titanium Flange Application and Selection Guide!

I. Core Application Areas

1. Petrochemical and Chemical Industry

Corrosive Media Transportation: Used for connecting pipelines carrying highly corrosive fluids such as chlorine, sulfuric acid, and nitric acid. Titanium flanges can significantly reduce maintenance frequency and extend system life.

High-Temperature and High-Pressure Systems: Titanium alloy flanges are required in cracking units, reactors, and other applications. Their creep resistance remains stable at high temperatures of 300-600°C. Grade 9 Ti-3Al-2.5V Titanium Foil / titanium flange / Gr1 Pure Titanium Sheet

2. Aerospace Field

Engines and Fuel Systems: Titanium alloy flanges are used in aircraft engine combustion chambers, fuel injection systems, and hydraulic lines. Their lightweight properties improve fuel efficiency.

Spacecraft and Rockets: Liquid oxygen/liquid hydrogen transport pipelines and propulsion systems require the low-temperature toughness and radiation resistance of titanium alloys.

3. Marine Engineering and Shipbuilding

Seawater Desalination and Salt Spray Environments: TA2 titanium flanges are resistant to seawater erosion and salt spray corrosion, suitable for offshore platforms, ship ballast water systems, and other applications.

Non-Magnetic Requirements: The non-magnetic properties of titanium flanges prevent interference with ship navigation equipment.

Non-Magnetic Detection Equipment: In precision instruments such as nuclear magnetic resonance imagers, titanium flanges prevent electromagnetic interference.

II. Key Selection Factors

1. Material Suitability

Highly Corrosive Environments: TA9 or Gr7 should be prioritized due to their superior resistance to pitting and crevice corrosion.

High Temperature and High Pressure: Titanium alloy TC4 maintains strength stability below 600°C, suitable for high-temperature petrochemical pipelines.

General Lightweight Applications: TA1/TA2 pure titanium is more cost-effective and suitable for general industrial pipelines.

2. Structural Form and Sealing Design

High-Pressure Systems: Butt-welded flanges with ring joint face seals are used, with a pressure rating of PN≥10.0MPa.

Frequent Maintenance Scenarios: Lap joint flanges are easy to disassemble and assemble, reducing maintenance costs.

Low-Pressure Small-Diameter Pipelines: Threaded flanges or socket-welded flanges can save costs.

3. Process and Inspection Standards

Forging Grade: Grade III forgings are mandatory for ultra-high pressure applications. Inspection requirements: The product must pass ultrasonic flaw detection and dimensional tolerance testing.

Key Considerations for Selecting Titanium Tubes: Checking Surface Treatment Process for Corrosion Resistance

In the selection and application of titanium tubes, the surface treatment process is a crucial factor affecting their corrosion resistance. Although titanium tubes inherently possess a certain degree of corrosion resistance, the surface may retain rolling scale, oil stains, or minor scratches after manufacturing. These defects can damage the natural oxide film on the titanium tube surface, increasing the risk of localized corrosion, especially in harsh corrosive environments such as strong acids and bases. Therefore, checking the surface treatment process of titanium tubes is essential.  Acid pickling and passivation treatment can further enhance corrosion resistance.  Confirming the quality of this treatment is a critical step in ensuring the stable operation and extended service life of titanium tubes in corrosive conditions, and is a core consideration in titanium tube selection.

Acid pickling and passivation treatment optimizes the surface condition of titanium tubes through chemical action, significantly enhancing corrosion resistance. This process typically consists of two steps: acid pickling and passivation. The acid pickling stage uses a mixed solution of dilute nitric acid and hydrofluoric acid to remove oxide scale, rust, and oil stains from the titanium tube surface, eliminating surface defects. The passivation stage uses a strong oxidizing solution (such as concentrated nitric acid) to promote the formation of a denser and more stable oxide film (titanium dioxide film) on the titanium tube surface. This reinforced oxide film can more effectively block the penetration of corrosive media, reducing the risk of localized corrosion (such as pitting and crevice corrosion). For example, in sulfuric acid transportation pipelines in the chemical industry, untreated titanium tubes with residual oxide scale are prone to pitting corrosion, resulting in a service life of only 3-5 years; while titanium tubes that have undergone proper acid pickling and passivation have a complete and uniform surface oxide film, effectively resisting sulfuric acid corrosion, extending the service life to 8-10 years, and reducing the risk of media contamination caused by corrosion. 3 Inch Titanium Pipe / Gr1 Pure Titanium Pipe / Grade 3 Pure Titanium Pipe / ams 4944 seamless pipe

Confirming the quality of titanium tube acid pickling and passivation treatment requires a comprehensive assessment from both appearance and inspection reports. High-quality pickled and passivated titanium tubes should have a uniform silver-white or grayish-white surface, free from noticeable color differences, spots, residual stains, or scratches, and feel smooth to the touch.  If the surface appears yellowish, blackened, or shows localized discoloration, it may indicate incomplete pickling or uneven passivation film formation, which will affect corrosion resistance. Furthermore, manufacturers should provide a pickling and passivation test report, clearly stating the processing parameters (such as acid concentration, treatment temperature, and time), passivation film thickness test data (usually required to be ≥50nm), and salt spray test results (e.g., 48 hours of neutral salt spray test without corrosion). For example, when a marine engineering company purchased titanium tubes, they found yellowish marks on the surface of some tubes during visual inspection.  Combined with the "insufficient passivation time" record in the test report, they promptly returned the defective products, preventing subsequent rapid corrosion of the titanium tubes in the seawater environment due to passivation film defects.

In summary, checking the surface treatment process of titanium tubes, especially confirming the quality of pickling and passivation treatment, is a crucial step in ensuring their corrosion resistance. When purchasing, first observe whether the surface appearance of the titanium tubes meets the standards, then request and verify the pickling and passivation test report to ensure that the treatment process is standardized and the quality meets the requirements. For titanium tubes used in highly corrosive conditions, sampling salt spray tests or re-testing of passivation film thickness can be requested to further verify the treatment effect. By strictly controlling the surface treatment quality, titanium tubes can fully utilize their corrosion resistance advantages, providing reliable protection for the safe operation of industrial pipeline systems in corrosive environments.

What are the uses of sputtering targets? Applications and Structure

Sputtering targets, also known as sputtering targets, are one of the main materials used in thin film fabrication. Although not as well-known as photoresist, they are indispensable materials in chip manufacturing, and the quality of the target affects the performance of the finished chip. So, in which industries are sputtering targets currently used? Many people are curious about this, so the following will introduce the uses and structure of sputtering targets. Tantalum Sputtering Target

I. Uses of Sputtering Targets

1. Used in Displays

Sputtering targets are currently widely used in flat panel displays (FPDs). In recent years, the application rate of FPDs in the market has been increasing year by year, which has also driven the technology and market demand for ITO sputtering targets. There are two types of ITO sputtering targets: one uses indium tin alloy targets, and the other uses a mixture of nano-sized indium oxide and tin oxide powder sintered together.

2. Used in Microelectronics

Sputtering targets are also used in the semiconductor industry. Relatively speaking, the semiconductor industry has more stringent requirements for the quality of sputtered thin films. 12-inch (300mm) silicon wafers are now being manufactured, but the width of interconnects is decreasing. Currently, silicon wafer manufacturers require target materials to be large in size, high in purity, low in segregation, and fine in grain size, placing high demands on their quality. This necessitates target materials with superior microstructures.

3. Applications in Storage Technology

The storage technology industry has a large demand for target materials. The development of high-density, high-capacity hard drives relies heavily on giant magnetoresistive (GMR) thin-film materials. CoF~Cu multilayer composite films are currently widely used GMR thin-film structures. TbFeCo alloy target materials for magneto-optical disks are still under development; magneto-optical disks manufactured using these materials have long lifespans, large storage capacities, and can be repeatedly erased and rewritten without contact.

II. Structural Composition of Target Materials

1. Target Blank

The target blank is the core component of the target material. It is the target material bombarded by the high-speed ion beam and involves high-purity metals and grain orientation control. During sputtering deposition, the target blank is bombarded by ions, causing its surface atoms to be sputtered and deposited onto the substrate to form an electronic thin film.

2. Backplate

The backplate is mainly used to fix the sputtering target material, involving welding processes. Because high-purity metals have relatively low strength, and sputtering targets need to be installed in a specialized machine for the sputtering process, the machine provides a high-voltage, high-vacuum environment. Therefore, the ultra-high-purity metal sputtering target blank needs to be bonded to the backplate using different welding processes. Consequently, the backplate also needs to have good thermal and electrical conductivity.