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Stainless Steel and Corrosion

What is corrosion?

Metals, with the exception of the precious metals such as gold and platinum, that are found in their natural state are always extracted from ores; metals have therefore a tendency to revert to their stable state, which corresponds to their original state, that is to say their oxide form.

Metal corrosion is essentially an electro-chemical reaction at the interface between metal and surrounding environment.

Stainless Steel and the passive layer
Steel is an alloy of iron and carbon. Contrary to carbon steel, the presence of a minimum of 10.5 % chromium in the stainless steel gives it the property of corrosion resistance.

 

However if this protective layer is damaged, the start of corrosion can appear.

 

What are the major factors of corrosion?

What are the 5 principal types of corrosion linked with the surrounding environment ?

Generalised corrosion is noticed when stainless steel is in contact with an acid medium and localised corrosion is seen in the majority of cases when stainless steel is placed in a neutral chloride environment.

 

 

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What is UGINOX® Patina K44?

UGINOX Patina K44 is a bistabilized ferritic stainless steel with an electro-tinned coating on both sides. This ferritic stainless steel is K44 and belongs to the KARA range: it contains 18% chromium and molybdenum and is stabilised with titanium and niobium. UGINOX Patina K44 weathers over time, acquiring a matt finish through natural patination giving a traditional rustic final appearance. UGINOX Patina K44 has the benefit of a high corrosion resistance, suitable for use in aggressive atmospheres.

Think Stabilised Stainless Steel !

  • Chromium is a key chemical compound, which basically gives stainless steel its corrosion resistance property. Indeed a chromiumoxide is created on the material surface in contact with air and water. This layer repairs itself and therefore protects the surface.
  • Molybdenum reinforces its corrosion resistance.

Key strengths

  • Workable at low temperatures, including in mountainous regions.
  • Ease of soldering.
  • Low thermal expansion coefficient: enables the use of long sheet lengths in single sections.
  • High corrosion resistance, suitable for use in aggressiveatmospheres.
  • Nickel-free grade offering price stability over time.
  • 100% recyclable.

Applications

  • Standing seam roofing.
  • Self supporting roofing.
  • Cleated seam roofing.
  • Suitable for cold
  • Cold roof or warm roofs.
  • Gutters.
  • Roofing accessories.

 

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UGINOX Patina K44: Atmospheric exposure

UGINOX Patina K44 is naturally resistant to corrosion and suitable for any environment.*

Roofing:
UGINOX Patina K44 will adapt to any location for roofs including coastal / marine areas and installed according to current good practices (e.g. NF DTU 40.44 French Code). When exposed to the atmosphere the Tin coating will develop a natural patina. In roofing applications the change is noticeable after a few weeks and especially following rainfall the process will be substantially complete after a few months.

Vertical cladding:
In vertical cladding or sheltered soffits the surface receives less moisture and the patina will take longer to develop. In such areas, where cleaning operations may also be required we recommend an alternative Aperam facade surface such as UGINOX Top.

Behaviour to localised corrosion
Along with the tinned coating, the corrosion resistance of the underlying base material is of primary importance.

Our dimensional range

  • Thickness: 0.5 mm
  • Maximum width: 1160 mm
  • Available in coil, slit coil and sheet

Recommendations

  • Use UGINOX Patina K44 for standing seam, self supporting and cleated seam roofing, as well as for accessories.
  • Avoid the use of UGINOX Patina K44 in vertical and sheltered areas.
  • Use dedicated tools to avoid any risk of cross contamination.
  • Do not work with other metals adjacent to UGINOX Patina K44, which could cause contamination as a result of projections.
  • Avoid the use of metallic pads or wire wool including powder based abrasives.
  • Before soldering use an orthophosphoric based acid for pickling. Use of chlorine based pickling agents is prohibited. We recommend immediate rinsing with water after soldering.

*While every care has been taken to ensure that the information contained in this article is accurate as possible it should not be used as a guide without further consultation with the manufacturer.

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Fully Supported Roofs: Standing Seam Roofs

Standing Seam Roofs

This traditional technique is distinguished by its linear rhythm; the standing seam gives it a particularly clear finish.

Assembled on site from stainless steel strips, these roofs are suited to both contemporary and traditional architecture.

The stainless steel strips are joined along their length by crimping of the previously raised edges. The bending or closing of the profile is performed in the traditional manner or using specialist tools.

The limited number of transverse seams and welds ensures maximum weathertightness. Standing seams can be used on warm or cold roofing systems.

Strengths

  • Ideal for large flat surfaces that require the use of long strips.
  • Cost reduction by the use of longer pieces and low weight per m2.
  • Not fragile and no risk of fracturing at low temperatures.
  • Immaculate aesthetics.
  • Ideal technique for curved surfaces and complex shapes (domes, cones, etc.).

Capacities relating to entirely roofing coverage types

The use of stainless steel enables the use of 14 to 30 metres lengths of strip – dependent upon national regulations – in thicknesses between 0.4 mm and 0.5 mm.
The widths installed depend on the project location (sheltered, normal or exposed) and on each country’s wind zones.

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Why stainless steel is the ideal choice for roofing and cladding

Affording freedom of form and appearance, stainless steel roofing blends into all environments and is suited to all styles of architecture, both new and renovation projects. Long lasting, easy to maintain and recyclable, it is also the sustainable material of choice.

The advantages of stainless steel for roofing and cladding…

  • Lighter envelope, thanks to high mechanical properties that permit a reduction of thickness.
  • Compatible with all types of support: metal, all types of wood, etc.
  • Possible association with construction systems giving thermal properties and/or acoustics.
  • Response to national and European thermal regulatory requirements.
  • More cost-effective than traditional products and techniques.
  • All types of claddings are possible, both new and refurbished.
  • In refurbishment, the stainless steel envelope transforms and modernises the building while respecting thermal regulations and omitting thermal bridges.
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Stainless steel, a combination of performance and aesthetics for your projects

Design

Our wide range of grades and surface finishes will let you choose stainless steel that will provide your building with continuity and sustainability thanks to corrosion resistance that is adapted to any given atmospheric environment. Furthermore, our various stainless steels have excellent physical properties even at very low temperatures. On one hand, this allows you to use thinner pieces, providing for a lower weight per m2, and on the other hand, you can use very long pieces in single sections.

Our products are transformed and easily installed using traditional tools and machinery.

Economic performance

Designing and building with stainless steel contributes to an excellent overall cost, that is a positive relationship between the final cost and the lifetime of the work. This comes as a result of the exceptional durability of stainless steel buildings, and the almost non-existent, easy maintenance.

The price stability, especially with our ferritic grades, as well as the cost of transformation and installation is comparable to other traditionally used metals, giving stainless steel its competitiveness.

Aesthetics

Stainless steel offers creative freedom and architectural design which is rarely matched. Our impressive range of thicknesses and wide range of surface finishes – from the more dull to the colourful to the most brilliant.

Stainless steel allows for the creation of complex shapes and pairs well with other materials such as glass, wood, stone, etc.

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What is Uginox Patina K44?

UGINOX Patina K44 is a bistabilized ferritic stainless steel with an electro-tinned coating on both sides. This ferritic stainless steel is K44 and belongs to the KARA range: it contains 18% chromium and molybdenum and is stabilized with titanium and niobium.

UGINOX Patina K44 weathers over time, acquiring a matt finish through natural patination giving a traditional rustic final appearance. UGINOX Patina K44 has the benefit of a high corrosion resistance, suitable for use in aggressive atmospheres.

Think Stabilised Stainless Steel !

Chromium is a key chemical compound, which basically gives stainless steel its corrosion resistance property. Indeed a chromium oxide is created on the material surface in contact with air and water. This layer repairs itself and therefore protects the surface.

Molybdenum reinforces its corrosion resistance.

Key strengths

  • Workable at low temperatures, including in mountainous regions.
  • Ease of soldering
  • Low thermal expansion coefficient: enables the use of long sheet lengths in single sections.
  • High corrosion resistance, suitable for use in aggressive atmospheres.
  • Nickel-free grade offering price stability over time.
  • 100% recyclable.

Applications

  • Standing seam roofing.
  • Self supporting roofing.
  • Cleated seam roofing.
  • Suitable for cold
  • Cold roof or warm roofs.
  • Gutters.
  • Roofing accessories.

 

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Privacy Policy

Privacy & Cookie Policy

Privacy Statement
At Uginox (Associated Lead Mills Ltd) we are committed to maintaining the trust and confidence of our website visitors and customers by respecting, protecting and offering transparency regarding the data we gather and hold on you. The objective of this policy is to offer you an insight into how we collect and store your personal data that you have provided to us. We do not sell trade or rent our customer data under any circumstance.

If you have additional questions or require more information about our Privacy Policy, do not hesitate to contact us.

Website Privacy Policy
This privacy policy sets out how Uginox (Associated Lead Mills Ltd)  uses and protects any information that you give Uginox (Associated Lead Mills Ltd)  when you use this website.Uginox (Associated Lead Mills Ltd) is committed to ensuring that your privacy is protected. Should we ask you to provide certain information by which you can be identified when using this website, then you can be assured that it will only be used in accordance with this privacy statement.Uginox (Associated Lead Mills Ltd) may change this policy from time to time by updating this page. You should check this page from time to time to ensure that you are happy with any changes.

What We Collect
We may collect the following information:

• Name and job title
• Contact information including email address
• Demographic information such as postcode
• Telephone Number
• (IP) address


What We Do With The Information We Gather

We require this information to understand your needs and provide you with a better service, and in particular for the following reasons:

• Internal record keeping.
• We may use the information to improve our products and services.
• We may periodically send promotional emails about new products, special offers or other information which we think you may find interesting using the email address which you have provided.
• From time to time, we may also use your information to contact you for market research purposes. We may contact you by email, phone, fax or mail. We may use the information to customise the website according to your interests.
 
Email Marketing
We use Mail Chimp as a provider to broadcast our Email marketing material. We utilise a double opt-in policy to ensure recipients want to hear from us. You can unsubscribe or update your marketing preferences at any time by simply clicking the links found in the footer of our email. Our Mail Chimp database is GDPR compliant.
 

Security
We are committed to ensuring that your information is secure. In order to prevent unauthorised access or disclosure, we have put in place suitable physical, electronic and managerial procedures to safeguard and secure the information we collect online.

How We Use Cookies

A cookie is a small file which asks permission to be placed on your computer’s hard drive. Once you agree, the file is added and the cookie helps analyse web traffic or lets you know when you visit a particular site. Cookies allow web applications to respond to you as an individual. The web application can tailor its operations to your needs, likes and dislikes by gathering and remembering information about your preferences.

We use traffic log cookies to identify which pages are being used. This helps us analyse data about webpage traffic and improve our website in order to tailor it to customer needs. We only use this information for statistical analysis purposes and then the data is removed from the system.

Overall, cookies help us provide you with a better website by enabling us to monitor which pages you find useful and which you do not. A cookie in no way gives us access to your computer or any information about you, other than the data you choose to share with us.

You can choose to accept or decline cookies. Most web browsers automatically accept cookies, but you can usually modify your browser setting to decline cookies if you prefer. This may prevent you from taking full advantage of the website.

DoubleClick DART Cookie

Google is one of a third-party vendor on our site. It also uses cookies, known as DART cookies, to serve ads to our site visitors based upon their visit to Uginox (Associated Lead Mills Ltd) and other sites on the internet. However, visitors may choose to decline the use of DART cookies by visiting the Google ad and content network Privacy Policy at the following URL – https://policies.google.com/technologies/ads.

Some of advertisers on our site may use cookies and web beacons. Our advertising partners are listed below. Each of our advertising partners has their own Privacy Policy for their policies on user data. For easier access, we hyperlinked to their Privacy Policies below.

• Google

https://policies.google.com/technologies/ads

We also use Facebook to display adverts, promotions and news to customers who have previously visited our website in the last 90 days.

Links To Other Websites
Our website may contain links to other websites of interest. However, once you have used these links to leave our site, you should note that we do not have any control over that other website. Therefore, we cannot be responsible for the protection and privacy of any information which you provide whilst visiting such sites and such sites are not governed by this privacy statement. You should exercise caution and look at the privacy statement applicable to the website in question.

Controlling Your Personal Information
You may request details via our personal data protection officer for information which we hold about you under the Data Protection Act 1998. If you would like a copy of the information held on you please email Uginox (Associated Lead Mills Ltd) at info@associatedlead.co.uk

If you believe that any information we are holding on you is incorrect or incomplete, please write to or email us as soon as possible at the above address. We will promptly correct any information found to be incorrect.