CORROSION CONTROL(Part 1)

Corrosion control is the prevention of deterioration by mitigating chemical reactions that cause corrosion in three ways - (i) by changing the environment, (ii) by making changes to the material, or (iii) placing a barrier between the material and its environment. As several factors influence corrosion of metals 24x7, corrosion control needs to be an ongoing and dynamic process. While preventive protection is ideal for any and all metals, advancements in material science and metallurgical engineering is making it possible for corrosion control solutions to be applied successfully to metals in treatable corrosion stages. Ideal corrosion controller models include Advanced VCI, OXY/ECO/FC/PU Coat and, film forming corrosion inhibitors.

Technologies at work at Deva

ADVANCED VCI

Volatile Corrosion Inhibitors (VCI) from Deva is an innovative organic compound with differentiated molecular structure, which remains active in the substrate where it is applied, example: paints, resins, varnishes, plastics, process fluids, cellulosic products, etc. These organic salts derived from ‘people and environment safe’ preservatives gradually volatilize, forming an invisible monomolecular layer which protects against corrosion, saturating the internal environment, without interfering with any electrical activity or, compromising the stability of the metallic surface.

Ideal for: Internal Preservation, External Preservation and Packaging Preservation

FILM FORMING

CORROSION CONTROL (Part 2) – RESTORATION PRODUCTS

The chemical action called corrosion destructs the surface of a material by oxidation or chemical combination. Among the several ways of combating corrosion is the modern, cost-effective, advanced and, environment and human safe methodology - Volatile Corrosion Inhibitors (VCI Technology).

Metals, whether ferrous or non-ferrous undergo corrosion at different points in their lifecycle. While preventive care can be provided to material before the damage/corrosion has started, ‘restoration’ is the process undertaken after the metal has been weakened in any manner through an external force such as environment which includes air, water and earth, pollutants, chemicals, biomass, contents the metal may be holding/protecting and so on. Corrosion restoration is a big concern for industries, ships and shipyards, packaging industries, storage yards and stored goods, operational factory equipment, uncommissioned machinery, undersea units and so on. Corrosion restoration processes may include derusting, degreasing, rust conversions or descaling.

DERUST

Rust Remover: Rust demands quick action on contaminated surface and, accelerated removal of iron oxides and peel-able layers. Dev Rust Remover using a special low-foam formulation to remove heavy contamination from rust and light oils also prepares the metal surface for subsequent painting. A multi-dip tank system to economically de-rust parts of the system is ideally used in this case. The Rust Remover, while removing heavy rust, gives the metal a fine layer of protection. The advantage is that this compound does not etch the bare metal excessively post removal of rust/corrosion.

Dev VCI W-Shield+: A water-based organic neutralizer that converts acidic residues to natural ones, it also forms a protective film on treated surfaces. A simple set up of multi-tank dip system to economically de-rust parts of the system and neutralize residual acids from prior processes is ideal for the effective use of Dev VCI W-Shield+. As the de-rusting process proceeds, the compound leaves behind an almost unnoticeable thin protective film, ready to affix stabilizing auto-repairable, anti-corrosive surface, leaving the surface ready for further treatment like painting.

DEGREASER

Dev VCI OD53: Dev VCI OD53 helps degrease ferrous and non-ferrous parts with high level of oil/grease layer with ease. A solvent-based degreaser, it evaporates post wash without needing even a wipe down with cloth post degreasing. Dev VCI OD53 is effective in cases of high degreasing requirements for geometrically complex parts. The advanced VCI monomolecular layer formation that is left behind post degreasing stops flash rusting till preservation application.

Dev VCI WD20: Dev VCI WD20 is a water-based degreaser with anticorrosion protection for metal parts and equipment. This advanced VCI is highly recommended for ferrous and nonferrous metals like aluminum, yellow metals and their alloys and those made of organic raw materials. Dev VCI WD20 works perfectly removing process dirt and fluids at temperatures of up to 60°C. It provides degreasing with anti-corrosive protection for ferrous and nonferrous materials, equipment stored indoors and is specially designed for high pressure wash in machines. The degreasing action also includes leaving behind an almost unnoticeable thin protective film on the metal, enabling fixture of stabilizing auto-repairable, anti-corrosive surface.

RUST CONVERTORS

Dev Rust Convertors are chosen in situations where labour intensive jobs like scraping, sandblasting, etc. need to be eliminated. Its 3-in-1 function of rust removal, forming a protective coating and, acting as a primer finds it an important place in treating metal formations such as machinery, equipment, railway coaches, steel bridges, ship repairs, etc.

Dev Rust Convertors are unique solutions or primers that can be coated on iron or steel surfaces to convert rust (iron oxide) into a protective shield. It is chosen for its high degreasing power in geometrically complex parts.

The Rust Convertor works by reacting with rust (iron (III) oxide), converting it into a stable complex that is hydrophobic and forms a layer which acts as a barrier to moisture, preventing further rusting, also acting as a primer for further processes like painting. Dev Rust Convertors through its advanced VCI monomolecular layer formation, stops flash rusting till preservation application.

DESCALING

Dev Descaler: The Dev Descaler is an advanced formulation based on polymers, chelating agents with phosphoric acid, that effectively removes organic foulants. The advanced VCI monomolecular layer formation helps stop flash rusting till preservation application. It is particularly useful in high degreasing situations such as for geometrically complex parts. Dev Descaler is suitable for HVAC industries, boiler, condenser, evaporator and CIP applications.