Titanium Plate Life Extension Guide For Harsh Service Conditions

Titanium plate has the features of low density, high specific strength and excellent corrosion resistance. It is easy to fail in extreme environments such as high temperature, strong corrosion, high wear and alternating load. The failures include pitting corrosion, crevice corrosion, hydrogen embrittlement, wear fatigue and so on. It will shorten its service life. To achieve a long service life for titanium plates, failures should be prevented from the source.

 

 

1. Corrosion-Dominated Service Conditions

Pure titanium has excellent corrosion resistance and it is easy to form a dense TiO₂ passivation film on the surface, resistant to corrosive media such as oxidizing acids and seawater. Suitable for low-temperature, low-wear and strong corrosion scenarios, but with average strength and wear resistance.

 

Titanium-palladium alloy with palladium has excellent resistance to crevice corrosion and reducing acids. It can solve the pitting problem of pure titanium in high-temperature halide ion and dilute acid environments.

 

Ti-6Al-4V has about twice the strength of pure titanium with similar corrosion resistance. Suitable for combined corrosion and medium-low load conditions, but not resistant to high-temperature concentrated hydrochloric acid and hydrofluoric acid.

 

2. Combined Wear and Corrosion Conditions

Ti-3Al-2.5V has balanced strength, formability and corrosion resistance, better erosion and abrasion resistance than pure titanium.

Titanium-molybdenum-nickel alloy has resistant to dilute sulfuric acid and hydrochloric acid corrosion, with good wear resistance and fatigue resistance.

 

3. High-Temperature Service Conditions

Ti-6Al-2Sn-4Zr-2Mo has good high-temperature strength and oxidation resistance .

 

Titanium aluminide alloy shows service temperature, excellent high-temperature oxidation resistance and creep resistance.

 

Prioritize matching corrosion resistance, then take strength and wear resistance into account. Pure titanium can not be used in reducing acids and high-temperature halogen environments to avoid corrosion failure.

 

 

1. Structural Design

Reduce laps and dead corners, adopt full-penetration butt welding, increase fillets, and select smooth sealing surfaces to prevent medium retention.

Avoid sharp corners and section abrupt changes; adopt arc transition at opening edges. Control surface roughness under alternating loads to reduce microcracks.

Isolate titanium from carbon steel, stainless steel, copper and other metals with insulating gaskets, coatings or use titanium clad plates.

 

2. Manufacturing Process

Adopt VAR and electron beam cold hearth melting to control oxygen, nitrogen, hydrogen and inclusions. Conduct temperature-controlled rolling to refine grains and homogenize microstructure.

Use TIG welding and plasma welding with full argon protection. Pickle and passivate after welding to restore passivation film and remove welding slag and spatter.

Remove burrs, scratches and oxide scales, and perform electrolytic or chemical polishing to reduce corrosion risks.

 

3. Composite Reinforcement

Titanium-steel clad plates are preferred for strong corrosion and high load conditions, prepared by explosive cladding or roll cladding. The 0.5–5mm titanium layer ensures corrosion resistance and the steel base provides high strength. The cost is lower than pure titanium plates.

 

 

1. Passivation and Oxidation Treatment

Thickening TiO₂ film by nitric acid immersion, low cost and simple process. Suitable for conventional corrosion conditions but not wear-resistant.

Forming an oxide film, improving corrosion resistance by about 50% and colorable. Suitable for medical and marine components, but the film is brittle.

Forming a thick ceramic oxide film with combined corrosion resistance, wear resistance and high temperature resistance, strong adhesion. Suitable for combined corrosion, wear and high-temperature conditions.

 

2. Hard Coating Technology

Depositing TiN, TiAlN, DLC and other coatings with high hardness, friction reduction, wear and corrosion resistance. Gradient coatings have better erosion resistance.

Spraying ceramic coatings for wear and high temperature resistance, mostly used for large liners and mining equipment, requiring sealing treatment.

Forming high-hardness reinforced layers, significantly improving wear resistance and high-temperature oxidation resistance.

 

3. Advanced Protection Technologies

Inhibiting medium wetting, providing corrosion and fouling resistance in marine environments, greatly extending service life.

Automatically repairing passivation film, suitable for closed, deep-sea and other hard-to-maintain equipment.

Superior corrosion resistance to traditional coatings, suitable for high-temperature and strong corrosion extreme environments.

 

 

1. Corrosive Medium Control

Control oxygen and halide ion content, keep chloride ion concentration <200ppm to prevent pitting and crevice corrosion.

Adjust medium pH value and add corrosion inhibitors. Pure titanium is strictly prohibited from contacting hydrofluoric acid, concentrated hydrochloric acid and high-temperature sulfuric acid.

Filter solid impurities to reduce erosion and wear.

 

2. Temperature and Load Control

Strictly control service temperature in pure titanium , Ti-6Al-4V, titanium aluminide alloy, to avoid accelerated corrosion and creep due to over-temperature.

Reduce alternating loads, impacts and thermal cycling; install vibration-damping and buffer structures if necessary.

 

3. Hydrogen Embrittlement Prevention

Strictly control parameters during pickling and welding to reduce hydrogen penetration.

Add hydrogen removal agents to the medium or adopt palladium coating to reduce hydrogen adsorption.

Conduct regular dehydrogenation treatment by vacuum.

 

If you have purchasing plans for titanium plates, please send me a message for inquiry.. Email:Sam.Rui@bjrh-titanium.com