November 3, 2017 By Waverley Brownall

6 Alloys With Aqueous Corrosion Resistance

Aqueous corrosion resistance; the key to better sleep for every marine engineer!

If you’re looking for an alloy with outstanding resistance to aqueous corrosion, the below six are some of the best alloys on the market.

All alloys listed have incredible resistance to various forms of aqueous corrosion, including acids such as Sulfuric, Hydrofluoric, Nitric, Hydrochloric, salts, and seawater.

INCONEL® Alloy 22

Alloy 22, also known as Nickel alloy 22 or Hastelloy C-22, this high-grade alloy offers a wide variety of corrosion resistance. Its aqueous corrosion resistance is known as a top choice for resistance at higher temperatures. This alloy is used frequently for processing nuclear fuel and, thanks to its resistance to seawater, general marine industries.

INCONEL® Alloy 625

This nickel-chromium alloy offers high strength and thermal strength, resistance to oxidation and resistance in a large range of temperatures. This INCONEL alloy is known for its versatility which makes it a great choice for within a number of industries. It is known for its incredible heat-resistance, up to 815°C cryogenic temperatures. Inconel 625 has proven indispensable within the aerospace and marine industries.

INCONEL® Alloy 625LCF

This version of 625(LCF – Low Cycle Fatigue) is specifically designed with low cycle fatigue resistance at temperatures up to 649°C. Apart from the LCF benefits, this alloy holds properties similar to alloy 625 because of such a closely related chemical composition.

INCONEL® Alloy 686

Used mostly in areas of extreme corrosion – classed as a “super alloy”, Inconel 686 provides function at high temperatures and stresses. With a content of 59% Nickel, 19-23% Chromium and up to 17% Molybdenum on average, it can handle up to 104700 psi (tensile strength.)

INCONEL® Alloy G-3

Alloy G-3 is a nickel-chromium-iron alloy that has good weldability and resistances to intergranular corrosion. It is commonly used for dealing with phosphoric and sulfuric acids in particular. Another alloy developed by Special Metals Corporation, it has a low carbon content and high resistance to atmospheric and acid corrosion. It is machinable with use of high-speed tools at a continuous pace to avoid work-hardening.

INCOLOY® Alloy 825

Alloy 825, (along with Inconel 625) is one of the most popular choices of alloy for resisting corrosive substances. Most Incoloy’s in the 800 series, such as 800, 800H and 800HT are known for their incredible heat resistance, especially in treatment plants, pipelines, and tubing. Incoloy 825 is just as impressive, giving fantastic overall resistances, with high strength and resistance against stress-cracking, pitting and intergranular corrosion.

We recommend 825 for customers requiring a material that lives up to the “super alloy” name, particularly within petrochemical, oil and gas, pollution and processing industries.

Waverley Brownall manufacture fittings, components and valves from INCONEL® and INCOLOY® Special Metals materials for engineers within the UK and around the world.

October 10, 2016 By Waverley Brownall

Corrosion Of Structural Steel

Structural steel is attacked from many angles, fast changes in the atmosphere due to weather is one of the biggest challenges facing steel.

Luckily, in many modern and even historical projects, this is a challenge that can be faced at the outset of design and production. In fact, some of the very first largely pure iron structures such as the Coalbrookdale bridge have survived weather changes for 200 years.

Corrosion Of Structual Steel: Prevention And Considerations

Recognising the level of corrosion in the environment in which a metal is to be used is the key to preventing disasters.

High performance treatments of the alloy or consistent maintenance may be required in some circumstances.

The design of a large structure will influence its ability to withstand corrosive environments as much as post-building treatments.

Avoidance Of Corrosion

Examples of the considerations in structural design include:

The ability to easily access and apply the required maintenance and alloy treatments to the structure – sometimes this includes over night maintenance.
Elements within the structure to help with drainage issues Eg. Heavy rainfall that is not drained away quickly will cause more wearing than rain water that can fall from the building fast.
Places in which a structure may catch debris must be considered to avoid debris build up that will, overtime, effect the steel on which it sits.

General advice on the correct application of steel and steel used for structural projects can be found in BS EN ISO 12944-3.

The BSI Group offer advice on design considerations and the use of protective materials to be used on external areas of a steel structure.

Corrosion Resistance For Industrial Environments

Waverley Brownall manufacture instrumentation for industrial environments in special metals to provide the highest corrosion resistance possible.

Our fittings and valves are used in some of the most extreme environments in terms of atmosphere, temperature and acidity. This includes chemical processing plants, nuclear generation and the petroleum industry.

Because of these incredibly corrosive situations, the alloys we use in our manufacturing need to possess the highest performance possible.

Some of these special metals include: Monel alloy 400, Hastelloy C276, Titanium and Incoloy 825.

Even our standard material, 316 stainless steel is suitable for a number of environments within oil and gas and pipeline structures.

Corrosion resistant metals for fittings and valves are available to order from Waverley Brownall today.

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For any questions or requests, please contact us on: enquiries@waverleybrownall.co.uk

July 22, 2016 By Waverley Brownall

Chemical Processing Industry: Superalloy Solutions

Certain industries need the toughest metals to cope with harsh and corrosive environments. Waverley Brownall stock raw material, forgings, fittings and valves in a range of special metals for the perfect Superalloy solution.

What Is The Chemical Processing Industry?

enquiries@waverleybrownall.co.uk

The chemical processing industry impacts our everyday life in the modern world. From agricultural insecticides to consumer products such as cosmetics – the benefits and input of this industry are all around us.

The chemical processing industry consists of companies and organisations that produce industrial chemicals. This industry overlaps with the Petrochemical and Plastic sectors particularly, as many chemical companies also produce plastics.

Similar/linked industries include:

Petrochemical and Chemical Manufacturing
Pharmaceutical
Food Processing
Water and Wastewater Processing

The chemical process industry includes a variety of different sized businesses worldwide from the United States to Germany, Japan and the United Kingdom.

The Benefits Of Superalloy High Performance Special Metals

The chemical processing industry benefits from the use of these nickel-based alloys for their strength and corrosion resistance properties.

We offer a range of Superalloy in raw material and fittings for the chemical processing industry:

Monel 400 alloy
Titanium
Inconel 625
Incoloy 825
Hastelloy C276
Duplex and Super Duplex

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Our fittings and valves are designed and manufactured to the highest quality. They are designed for ease of use and safe application.

By choosing our instrumentation products in these superior materials, you can now benefit from all of the alloys advantages.

Resistance To Corrosive Substances And Chemical Environments

We have information on the effects of acidic corrosion on a range of alloys. Select the acid you wish to read about below:

*Clicking on the above links will open a new tab in your internet browser.

How Can I Find The Right Solution?

With such a large range of special metals to choose from, our engineers are able to give you professional advice on material and application. We will be able to guide you through the benefits of each metal and help you select the most effective Superalloy for any given environment.

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For over 40 years, we have specialised in the manufacture and supply of Superalloy fittings and valves. Crafted from high performance, corrosion resistant materials – our products are the highest quality of world-renowned British manufacturing.

Email: enquiries@waverleybrownall.co.uk