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August 8, 2016 By Waverley Brownall

Corrosion Prevention Material Selection

Corrosion Prevention Material Selection

The issue of corrosion within industries such as oil and gas, chemical processing and marine engineering is extremely important.

To avoid extreme health and safety issues and economic loss, businesses within these industries must be one step ahead of the corrosive media in the working environment.

Solutions for corrosion resistance are available in forms of coatings, but for long-term investment in corrosion resistance, material selection is the number one prevention tool.

Corrosion Prevention Material Selection: The Importance To All Industries

Selecting the correct material to withstand destructive acids, oxygen and waters is the key to avoiding disasters.

This is not only a consideration for economic factors, but industries must prevent disasters on a huge scale that include loss of life, such as the Guadalajara Sewer Explosion. This explosion resulted in the death of 215 people, with 1,500 injured and damage to 1,600 buildings within the surrounding area. You can read more about the explosion in this post on Some Of The Worst Cases Of Corrosion.

Prevention Of Corrosion

Topics covered in this Slideshare include corrosion prevention methods and the considerations regarding material selection for corrosion prevention efficiency.

Prevention of corrosion from Prof. T. K. G. Namboodhiri

Slideshare presentation original works by Professor TKG Namboodhiri,
Consultant in Metallurgy and Corrosion

Corrosion Prevention Material Selection

Materials that are used for their corrosion resistance are often called high-performance alloys, special metals, exotic alloys or exotic metals.

Special Metals (Corrosion-Resistant Metals)

Some metals hold the properties to withstand corrosive environments, alongside issues of pitting, stress-corrosion cracking and more. These metals are more expensive than a standard stainless steel, but they can provide strength within environments with acids, alkaline, salts and seawater.

Not every company can have a qualified metallurgist at hand, luckily, there is plenty of information available from the original creators of certain special metals available online. Such as, Haynes International’s information on the alloy Hastelloy-C276.

Waverley Brownall also offer a free book to help guide you in the selection of our range of special metals for extreme applications. This includes information on the main considerations such as availability, metal composition and corrosion resistance charts for a clear view of a metals resistance in comparison to each other.

Considerations For Metal Selection

  • Cost of investment (Short term VS. Long term)
  • Properties of material needed
  • Application of material
  • Product of material (Eg. Fittings, Valve)
  • Design
  • Material VS. Material comparisons to find the best solution
  • Technical advice
  • Industry requirements and regulations

Materials With High Corrosion Resistance

Metals that hold high-corrosion resistant properties include: Incoloy 825, Inconel 625, Hastelloy C-276, Titanium, Super Duplex, Duplex, 6MO. You can find out more about these on our special metals page.

Learn More With A Free Guide

This guide covers everything you need to know for selecting the right corrosion resistant material for our entire range of valves and fittings.

A Guide In The Selection Of Special Metals

*Posted FREE to your address

GET MY GUIDE
  • Corrosion charts
  • Applications
  • Strengths
  • Alloy properties and Composition

Corrosion Resistant Alloys In Oil And Gas Production

As an approved supplier to Conoco Phillips, BP and Shell, we fully understand the need for correct corrosion prevention material selection within Oil and Gas. Metals within an environment such as this are expected to thrive with external attacks from severe application and heavy usage over a long period of time. This is why we have specialised in manufacturing fittings and valves in special metals to not only cope in these conditions, but to provide the biggest value to engineers around the world.

nuclear power plant

Other Industries

  • Chemical
  • Processing
  • Purification/Water
  • Agriculture
  • Pump and Valve
  • Petroleum
  • Renewable Energy
  • Nuclear

Helpful Links

  • The Technical Measures Document by HSE.Gov
  • ​Corrosion Central by NACE.ORG

Contact Us

enquiries@waverleybrownall.co.uk

Filed Under: Uncategorized Tagged With: Corrosion Prevention Material Selection, corrosion protection materials, corrosion resistant alloys, corrosion resistant alloys in oil and gas production, Corrosion Resistant Materials, corrosion resistant metals, exotic alloy selection, exotic alloys, high performance alloy fittings, high performance alloys, special metals, super alloy composition, super alloys properties

August 2, 2016 By Waverley Brownall

Types Of Aqueous Corrosion Of Metals

Types Of Aqueous Corrosion Of Metals

The corrosion of metals is the destructive attack of an alloy and its material properties by an external environment.

With roughly 71% of the Earth’s surface being water, it’s not surprising that aqueous corrosion is such a big concern.

If left to corrode, metal (as part of large structures such as those in the offshore industry) can cause devastating damage.

4 Types Of Aqueous Corrosion

Galvanic Corrosion

This is the most basic form of aqueous corrosion. It occurs when two metals have physical or electrical contact with each other and are immersed in a (liquid) common electrolyte. A car battery is a common example of galvanic corrosion at work, the natural process of corrosion is used to supply electrical energy.

Filiform Corrosion

Filiform is actually a type of Galvanic corrosion that can often be seen on painted alloy engine components working in harsh industrial environments. The thread-like corrosion can appear on coated metals such as steel, iron and even zinc.

aqueous corrosion

Continue scrolling for prevention tips.

Pitting Corrosion

Pitting is one of the most commonly known types of corrosion that can happen to a range of alloys. It is a gradual breakdown of the metals surface. In this type of corrosion, it tends to penetrate the metal rather than spread and this is particularly notable on horizontal surfaces where gravity affects the intensity of the pitting.

Crevice Corrosion

As the name suggests, this type of corrosion is seen commonly in areas where metals are overlapping or areas of cracking. This occurs when one part of a metal is exposed to a different oxygen concentration than other parts. It is not a corrosion type that is exclusive to stainless steels – it can also effect other alloys such as aluminium and copper.

How can Aqueous Corrosion be prevented?

1. One way in which many industries are working against corrosion is to cover their alloys in a resistance coating.

“Rising demand for high performance anti-corrosion coatings in oil & gas, marine, power generation, construction, and other industries is estimated to positively impact the market growth by 2023.”

Source: High performance anti-corrosion coatings, High demand from emerging economies boosts market, industry outlook 2016 to 2023 by Transparency Market Research and Your Oil and Gas News

2. The use of special metals on instrumentation, valves, fittings and pipeline can help prevent the effects of corrosion. High performance alloys that counter aqueous corrosion are especially useful for industries such as Offshore, to be used on rigs and piping applications.

Get A Quote

Waverley Brownall are proud to supply numerous companies where seawater is one of the biggest issues facing the performance of an alloy. Our engineers understand the severity of corrosion issues and work towards providing the best solutions to prevent costly – and potentially, life-threatening problems.

Corrosion

Learn more about the selection of special metals for corrosive environments.
Covering atmospheric and acidic demands.

Filed Under: Uncategorized Tagged With: aqueous corrosion, corrosion of alloys, corrosion of metals, special metals, types of aqueous corrosion

July 25, 2016 By Waverley Brownall

Corrosion Resistant Valves, Ball Valves, Needle And More

Corrosion Resistant Valves, Ball Valves, Needle And More

Waverley Brownall manufacture corrosion resistant valves from a number of special alloy materials for peak performance. Suitable for industries looking for corrosion prevention fittings and valves as a long term investment for security and efficiency.

Special Alloys, Exotic Materials

  • High performance
  • Cost-effectiveness over a long-term period (investment for the future)
  • UK manufactured to a high quality
  • Raw materials are available alongside fittings and valves
  • Perfect for industries such as Marine and Chemical

Corrosion Resistant Valves

*Please note: Ranges displayed such as temperature, cracking pressures and more may be dramatically increased with use of corrosion resistant materials such as Monel 400, Titanium and others.

The information displayed is relevant to our standard stainless steel products.

Corrosion Resistant Materials Available:

Monel 400, Inconel, Incoloy, Hastelloy,
Titanium, 6MO, Duplex and Super Duplex.

Full, unique information on temperature ratings, performance and spec will be provided with your enquiry/quotation in regard to your specific material requirements.

Material certification can also be provided with your order of our corrosion resistant valves.

Ball Valves Temperature Range Pressure Range Sizes “
BV 1000 Series -45 to 230C 0-1000psi 1/4, 3/8, 1/2, 3/4, 1
1000psi ball valve female female

Applications include low pressure shut off, compressed air service, areas of liquid or vapour and can be used as a drain valve.

Featured (right)  1000psi Female/Female ball valve. Male/Female and Straight Hosetail valves are available.

Threads: BSPT, NPTF

Materials: Stainless Steel, Monel 400, Inconel, Incoloy, Hastelloy, Titanium, 6MO, Duplex and Super Duplex.

Ball Valves Temperature Range Pressure Range Sizes
BV 3000,6000 Series -45 – 230C 3000 and 6000psi Metric and Imperial
compression ended ball valve

Ball valve types: Female/Female, Male/Female, Male/Male, Compression ended 3000 and 6000 class.

More information on compression ends for our ball valves can be found on pages 18 and 19 of our precision valve catalogue.

Threads: BSPT, NPTF, BSP

Other available ball valves are our lockable handle ball valves and our cast 316 range from 1/4″ to 2″ available as ex-stock. Water or gas applications.

Materials: Stainless Steel, Monel 400, Inconel, Incoloy, Hastelloy, Titanium, 6MO, Duplex and Super Duplex.

Needle Valves Temperature Range Pressure Range Sizes
Precision Valves -20 to 200C or 400C 0-6000psi or 10k psi 1/4, 3/8, 1/2, 5/8
needle valves compression ends

Ringlok NPT, BSPT and BSP precision needle valves with or without bleed, compression ended single or three piece bodies.

Metric: 6mm, 8mm, 10mm, 12mm OD sizes.

Materials: Stainless Steel, Monel 400, Inconel, Incoloy, Hastelloy, Titanium, 6MO, Duplex and Super Duplex.

Manifold Valves Temperature Range Pressure Range Sizes
2, 3 and 5 Way On request 6000-10,000psi On request
5 way manifold stainless steel

Threads: NPT, BSPT, BSPP.

Valve mounting: Direct or Remote

Vent sizes will vary, contact us on enquiries@waverleybrownall.co.uk for full weight and dimension information of our manifold valves.

Check Valves Temperature Range Pressure Range Sizes “
CV Series -45 to 230C and -23 to 200C 0-3000psi 1/4, 3/8, 1/2, 3/4, 1
male/female check valve in stainless steel

Female/Female, Male/Female, Compression Ended Check Valves.

Materials: Stainless Steel, Monel 400, Inconel, Incoloy, Hastelloy, Titanium, 6MO, Duplex and Super Duplex.

Check Valves Temperature Range Pressure Range Sizes “
Mini Valve Series -23 to 200C and -40 to 120C 0-6000psi 1/4 or 1/2
miniature check valves stainless steel

Threads: NPT, BSPT, BSP.

Prevents reverse flow. A low pressure relief valve that locks upstream pressure for liquid or vapour services.

Relief Valves Temperature Range Pressure Range Sizes “
Female/Female and Male/Male -20 to 200C and -40 and 120C 6000psi 1/8, 3/16, 1/4, 1/2

Metric sizes are also available. 6mm, 8mm, 10mm and 12mm.

Filed Under: Uncategorized Tagged With: corrosion resistant valves, exotic materials, exotic metals, special alloys, special metals

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