Protection against corrosion

Corrosion inhibitors are one of the practical and cost-effective way of preventing and inhibiting corrosion. An inhibitor's primary function includes creating a barrier by forming one or more molecular layers to protect against corrosive attacks. Organic molecules are one of the most popular, efficient, and practical corrosion inhibitors, and all studies demonstrate that organic compounds, preferentially those containing nitrogen (N), sulphur (S), and oxygen (O), have high inhibitory efficiency

28p dianmotminh02 03-05-2024 2 1   Download

This specification covers coppered carbon steel wire supplied in coils for general use. It may be produced hard drawn, annealed in process, or annealed at finish size. The coating is very thin and is not designed for protection against corrosion.

3p hth_hn_vn 10-12-2023 6 5   Download

The sacrificial anode is one of the most effective methods to protect against corrosion of metal in an electrolyte environment. Aluminium, zinc, and magnesium are the metals mostly employed for sacrificial anode cathodic protection of metals. Each sacrificial alloy anode with different closed-circuit potential and electrochemical capacity can be used in different conditions and environments. This paper presents the sacrificial anodes manufactured by the Vietnam Petroleum Institute (VPI) and their qualities.

7p kequaidan6 10-07-2020 22 0   Download

Blades and vanes for gas turbines, usually made of Ni-based superalloys, are exposed at very high temperature in severe oxidation and corrosion environments. Nowadays, thermal barrier coating systems (TBCs) have been applied to protect them against such severe working conditions. In this study, Pt and PtIr diffusion coatings on Ni based single crystal superalloys were fabricated by an electroplating method followed by an annealing heat treatment process. The microstructure and phase constitution of the coatings were studied by SEM/EDS and XRD methods.

10p chauchaungayxua2 07-01-2020 13 0   Download

The present study shows a novel method for the synthesis of uniformly-shaped poly(othophenylediamine) (PoPD) nanofibers by chemical oxidative polymerization method for application towards smart corrosion resistance coatings. Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) studies confirm morphology of PoPD with three dimensional (3D) networked dendritic superstructures having average diameter of 50–70 nm and several hundred meters of length.

8p kethamoi1 17-11-2019 20 0   Download

The thesis aims to investigate and select suitable conditions for synthesis of Nanocompozit Silica / Polypyrol by In-situ method. Nature and study of corrosion inhibition ability of Silica / Polypyrol carbon steel. Select suitable conditions for synthesis of silica / Polypyrol anionic doped for In-situ method. Corrosion inhibitory ability for Nanocompozit Silica / Polypyrol-Anion Carbon steel for polybutyral coating. Corrosion protection for carbon steel of epoxy coating containing SiO2 / polypyrol-anion composite.

27p xacxuoc4321 09-07-2019 48 4   Download

To protect the regenerative air heater against corrosion when operating the boiler at low loads and/or low ambient air temperatures, a steam coil air heater will be required in the secondary air ducts between the FD fans and the regenerative air heaters. The steam coil air heater should be designed to heat combustion air at any load from the minimum ambient temperature, 16.7 ºC, up to a temperature suitable to protect the cold end elements of the regenerative air heater. Supply of the steam coil air heater will not be by Babcock & Wilcox.

2p khaionline91 02-05-2017 39 3   Download