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To give a brief review discussing all areas of technology is an impossible task — however, many engineers, consultants etc., have to decide from a mass of literature what system to use for a particular project. The author's company give a free world wide service in technical advice in the following areas — marine, tank lining, pipe coating, offshore rigs and structures, jetties, dock gates, bridges, chemical plants and all other structures exposed to severe conditions. The following general comments should provide a basis for consideration.

Potassium silicate sealer was applied on solvent-cleaned, acid-pickled, dacromet-coated steel to improve its corrosion resistance. The purpose of this paper is to study the corrosion behavior of dacromet-coated steel.

Potassium silicate sealer was applied on solvent-cleaned, acid-pickled, dacromet-coated steel to improve its corrosion resistance. Electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and salt spray were carried out. SEM was used to study the morphological appearance of the surface.

The EIS behavior indicated that solvent-cleaned dacromet-coated steel sealed with potassium silicate showed that the corrosion current density was 2.664E − 5 A.cm² which was reduced to 8.752E − 6 A.cm² and the corrosion rate, which was 2.264E − 2 mm.year⁻¹, was reduced to 7.438E − 3 mm.year⁻¹ in NaCl 3.5 wt.per cent. EIS was used in NaCl 3.5 wt.%, and the Bode plot characteristics showed that the corrosion protection of solvent-cleaned, dacromet-coated steel was enhanced when sealed with potassium silicate. The EDS results of salt-sprayed, solvent-cleaned samples after 10 days indicated that the main corrosion products are composed of SiO₂, ZnO and Al₂O₃.

The detection of Li element in EDS was not possible because of the device limitation.

The current paper provides new information about the sealing properties of potassium silicate and its effects on the corrosion resistance of dacromet coating, which is widely used in many industries such as the automobile industry.

The purpose of the paper is to show the corrosion effect of benzotriazole in comparison with iron phosphate (PFe) coating as a sealer for the PFe layer in carbon steel paint pre-treatment and to show its ecological advantages as a more environment-friendly inhibiting compound than PFe.

Samples of carbon steel (SAE 1010) were phosphated in two baths, one containing iron PFe and PFe and BTAH (PFe + BTAH). Anodic potentiostatic polarization curves and electrochemical impedance spectroscopy were used to evaluate the corrosion resistance of phosphated carbon steel in 0.1 molL−1 H₂SO₄, 0.5 molL−1 NaCl and 0.1 molL−1 NaOH. The phosphate layers obtained were analyzed by infrared spectroscopy. Surface observation by scanning electron microscopy (SEM) showed that the PFe and PFe + BTAH layers are deposited as crystals with granular morphology. The electrochemical results showed that the PFe + BTAH coating was more effective in corrosion protection of the carbon steel.

This paper presents the application of benzotriazole as post-treatment of PFe-coated carbon steel. The results show that benzotriazole improves the phosphate layer properties. The SEM micrographs showed that the layer formed in PFe and PFe + BTAH baths consists of grain-like crystals, and infrared results revealed the BTAH presence in PFe phosphate. The corrosion resistance results showed higher efficiency associated to the PFe + BTAH phosphate layer relative to that of PFe. From the present study, results can be concluded that BTAH can be used as a post-treatment for PFe phosphate coating.

This paper deals with the corrosion resistance and surface carbon steel characterization of a new sealer for PFe coating, which has been prepared for this study and was never tested previously. These are candidate materials for substitution of chromium sealer. The BTAH sealer presents environmental and corrosion resistance advantages when compared with the post-treatment based on chrome. Although BTAH improves PFe layers’ properties, it is the worst phosphate coating. This manuscript has never been previously submitted and deals with original results.

Drying paint, varnish or lacquer coatings on any substrate is a study in inefficiency if we try to relate the energy input to the energy which actually dries and converts the surface coating.

The object of this article is to disclose the results obtained from a programme of work studying the use of zinc‐rich paints as primers for painting systems to be exposed to marine immersion. This programme was commenced early in 1963 with a view to deriving information on the way these systems functioned and hence to establish a code of practice which would enable personnel responsible for the protection of marine structures to obtain the best results with systems based on these primers.

Macpherson Paints has introduced a problem‐solving Stain Sealer to their general products range to meet the growing demand for water‐based paints.

New proprietary products continue to evolve. Many of them are water‐borne and are motivated by ecological considerations. Specialty products whose producers hope that their specialised nature will capture small but profitable areas of the market also continue to appear. Following is a review of some of the products that have evolved in the recent past.

New primers The desire to inhibit corrosion motivates continual research on primers.

Enormous amounts of paint will be required in the coming decades to maintain the 570,000 bridges spanning the US rivers, canals and road‐ways and providing access to more than 3.5 million miles of US highways.