Corrosion inhibitor screening for galvannealed steel and high-strength steel

Corrosion on the car underbody can affect critical parts, which poses safety risks. The current corrosion protection methods such as wax, sealers and coatings are not effective enough and an advance form of corrosion protection is desired. Implementation of smart coatings might be an effective solution. These coatings contain a self-healing...

Combined Corrosion and Wear of Aluminium Alloy 7075-T6

The aluminium alloy 7075-T6 is widely used in engineering. In some applications, like slurry transport, corrosion and abrasion occur simultaneously, resulting in early material failure. In the present work, we investigated the combined effect of corrosion and wear on the aluminium alloy 7075-T6. We performed two series of wear experiments to...

Protective film formation on AA2024-T3 aluminum alloy by leaching of lithium carbonate from an organic coating

An investigation into corrosion inhibition properties of a primer coating containing lithium carbonate as corrosion inhibitive pigment for AA2024 aluminum alloy was conducted. It was found that, during neutral salt spray exposure, a protective film of about 0.2 to 1.5 ?m thickness formed within the area where an artificial defect was introduced...

Effect of Chemical Composition and Microstructure of Zn and Al-based Coatings on Electrochemical Response in Corrosive Environments

Hot formed steels are witnessing an increasing use in safety critical and structural parts for automobiles due to their high strength, light weight and absence of springback, due to which understanding the corrosion behaviour of coated products for hot forming is crucial to increase their stronghold in Body-In-White (BIW) applications for...

Investigation of the Inhibition Effect of Basic Oxygen Furnace Slag on the Corrosion of Galvanized Steel

Basic oxygen furnace (BOF) slag is a by-product of the steel conversion process in a basic oxygen furnace. A previous study at Tata Steel in Ijmuiden has discovered the inhibition effect of BOF-slag on the corrosion of cold rolled- and hot-dip galvanized steel. This inhibition effect and its mechanism was studied in this work and its was...

The influence of microstructure on the corrosion behaviour of ferritic-martensitic steel

Modern steel alloys are composed of several phases, for example ferrite and martensite. By varying the fraction or the size of the grains of these phases, the mechanical properties of the alloy can be altered. These microstructural variations were already found before to influence the corrosion properties of the alloy; this has been investigated...

Aerosol-based Emission, Solvent Degradation, and Corrosion in Post Combustion CO2 Capture

Global greenhouse gas emissions, especially of CO2, have been increasing tremendously over the past century. This is known to cause not only an increase of temperature, but also a change in our climate. Along with a shift to renewable sources of energy, Carbon Capture and Storage is necessary to mitigate climate change. Power plants are the...

Probability-based strength reassessment of corroded FPSOs using monitored loads

FPSOs are nowadays a common practice in the production of oil at sea. These ship-type offshore units, however, cannot have regular dry-docking as they have to be on field sometimes even for their entire lifetime. This is the reason why structural monitoring systems may play an important role in the safety of these units. The MONITAS JIP was...

Use of Modified Hydrotalcites (MHTs) as a New Type of Smart Additive of Reinforced Concrete for Improved Corrosion Protection: An Electrochemical Performance Assessment in Simulated Concrete Pore Solution

MHTs (MHT-p, MHT-N) represented superior corrosion inhibition effect against chloride induced pitting corrosion in simulated concrete pore solution when compared with the pure inhibitors (pAB, NaNO2). Among them, MHT-p exhibited a better improvement of inhibition effect than MHT-N. This result is probably caused by the bigger ion exchange...

Multiple action self-healing coatings for the corrosion protection of metals (abstract)

The influence of deformation on the product performance of pre-coated packaging steels

Recent developments in various countries have led to the development of new types of polymer coated packaging steel. These materials behave differently in production and end use and are therefore subject of extensive studies. The aim of this research is to understand the influence of deformation of pre-coated packaging steel sheet on real can...

The role of magnesium in the electrochemical behaviour of 5XXX aluminium-magnesium alloys

An investigation concerning the effects of magnesium on the intergranular corrosion susceptibility of AA5XXX aluminium alloys was carried out. In the present work, magnesium is found to be highly mobile in the bulk metal as well as in the aluminium oxide. This mobility is also found to be dependent on the temperature and bulk magnesium...

Cr(VI) and Cr(III)-Based Conversion Coatings on Zinc

With the aims of understanding the protective mechanism of chromate conversion coatings and developing alternatives to chromate treatments, the physical natures and corrosion properties of Cr(VI) and Cr(III) treated zinc have been investigated in this work. The Cr(VI) treatments were carried out in dichromate and sulfuric acid solution with...