Metal corrosion inhibitor

Abstract

The invention provides a kind of metal anti-corrosion agent, which is made up of 20%-50% imidazole quinolin acrylamine which has fragrant ring, 20%-50% straight chain imidazole quinolin acylamine, 0-5% alkynol and its ramification, 0-60% solvent, the anti-corrosion agent has excellent anti-corrosion rate in strong acid (pH value<3.0) and alkalescence (pH value is 7.0-8.5%).

Description

technical field [0001] The invention belongs to the field of metal corrosion protection, in particular to a metal corrosion inhibitor. Background technique [0002] The corrosion problem of the condensation cooling system of the initial roof, constant roof and reduced roof (referred to as triple roof) of the atmospheric and vacuum unit of the refinery has always been an important factor affecting the long-term safe operation of the refinery unit. High, it is easy to cause stress corrosion cracking of austenitic stainless steel, which limits the upgrading of materials. At present, most domestic oil refineries use carbon steel, which makes it possible to use "one desalination, three injections" (electrical desalination, water injection, ammonia injection or organic amine injection) , Note corrosion inhibitor)-based process anti-corrosion measures become extremely important. [0003] The three tops of the atmospheric and vacuum device are typical HCl+H 2 S+H 2 Type O corrosi...

AI Technical Summary

Problems solved by technology

As mentioned above, because the PH value in foreign countries is controlled under weakly acidic conditions, there is no need to consider the problem of the corrosion inhibition rate of corrosion inhibitors under alkaline conditions, and the corrosion inhibition rate of their products under weakly alkaline conditions is very poor.

There are few products with high corrosion inhibition rate in the initial setting zone and weak alkaline conditions in China

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