Composition and method for treating white rust

Abstract

A composition and method of inhibiting white rust on galvanized steel in water system. The composition preferably comprises two parts, a first part comprising oleylamine and optionally comprising 2-diethylaminoethanol and cyclohexylamine, and a second part comprising phosphonobutane tricarboxylic acid, tolytrizole, and a polymer, and optionally comprising a tracer or sodium hydroxide. A preferred composition comprises two commercially available products, Cetamine V217 S and Chem-Aqua 31155. A preferred method of inhibiting white rust comprises adding the two parts of the composition or two commerically available products to the water in a water system to be treated in an amount sufficient to provide a concentration of the first part of around 200-500 ppm and of the second part of around 50-150 ppm.

What is claimed: 
     
       1. A composition for inhibiting white rust on galvanized steel in water systems, the composition comprising a first component and a second component, wherein
 the first component comprises oleylamine in an amount more than 0% and up to around 2.5%, and 2-diethylaminoethanol and cyclohexylamine; and 
 the second component comprises 5% to 15% 2-phosphonobutane-1,2,4 tricarboxylic acid, sodium salt (50%), 5-15% sodium tolytriazole (50%), and around 2% to 10% sodium polyacrylate or around 1-5% polymaleic acid sodium salt or both. 
 
     
     
       2. The composition according to  claim 1  wherein the second component further comprises a tracer. 
     
     
       3. The composition according to  claim 1  wherein the second component further comprises sodium hydroxide. 
     
     
       4. The composition according to  claim 1  wherein the first component further comprises around 2.5-10% 2-diethylaminoethanol and around 2.5-5% cyclohexylamine. 
     
     
       5. The composition of  claim 1  wherein the first component is in a concentration of 200-500 ppm and the second component is in a concentration of 50-150 ppm when added to water in the water system. 
     
     
       6. The composition of  claim 1  wherein a concentration ratio of the first component to the second component is between 1.33:1 and 10:1. 
     
     
       7. A two part composition for inhibiting white rust on galvanized steel in water systems, a first part of the composition consisting essentially of oleylamine in an amount more than 0% and up to 2.5%, 2.5-10% 2-diethylaminoethanol, 2.5-5% cyclohexylamine, and water; and
 a second part of the composition consisting essentially of 5% to 15% 2-phophonobutane-1,2,4 tricarboxylic acid, sodium salt (50%), 5-15% sodium tolytriazole (50%), 1-5% polymaleic acid sodium salt, 2% to 10% sodium polyacrylate, and water. 
 
     
     
       8. The two part composition of  claim 7  wherein the first component is in a concentration of 200-500 ppm and the second component is in a concentration of 50-150 ppm when added to water in the water system. 
     
     
       9. The two part composition of  claim 7  wherein a concentration ratio of the first component to the second component is between 1.33:1 and 10:1.