US2014011722A1PendingUtilityA1

Use of cellulose nanocrystals as a corrosion inhibitor

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Assignee: GARNER ANDREWPriority: Jul 4, 2012Filed: Jul 3, 2013Published: Jan 9, 2014
Est. expiryJul 4, 2032(~5.9 yrs left)· nominal 20-yr term from priority
Inventors:Andrew Garner
C10N 2040/22C10N 2020/063C10N 2030/12C23F 11/149C10M 171/06C10M 2209/12C23F 11/173B82Y 30/00C10M 145/40C10M 173/00
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Claims

Abstract

The present invention relates to the use of charged cellulose nanocrystals as a corrosion inhibitor. According to one aspect, there is provided a corrosion inhibitor comprising of a plurality of charged cellulose nanocrystals fibrils. There is further provided a process for inhibiting corrosion of metal equipment where water can reside. According to a further aspect, the process includes adding an effective corrosion inhibiting amount of acid-form the cellulose nanocrystals. According to another aspect, the process includes selectively causing a first set of the cellulose nanocrystals to be negatively charged. The first set of the cellulose nanocrystals so charged function as an anodic corrosion inhibitor. The process includes selectively causing a second set of the cellulose nanocrystals to be positively charged. The second set of the cellulose nanocrystals so charged functions as a cathodic corrosion inhibitor.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A corrosion inhibitor comprising:
 a plurality of charged cellulose nanocrystals fibrils.   
     
     
         2 . The corrosion inhibitor as claimed in  claim 1  wherein the cellulose nanocrystals are in acid-form. 
     
     
         3 . The corrosion inhibitor as claimed in  claim 1  for use in inhibiting corrosion in ferrous metals. 
     
     
         4 . The corrosion inhibitor as claimed in  claim 1 , wherein the charged cellulose nanocrystals fibrils are attracted to ionic components of a corroding metal surface. 
     
     
         5 . The corrosion inhibitor as claimed in  claim 4 , wherein the charged cellulose nanocrystals so attracted form a coating on the metal surface and inhibit electrochemical reactions from driving the corrosion process thereby. 
     
     
         6 . The corrosion inhibitor as claimed in  claim 1  wherein the cellulose nanocrystals are negatively charged and function as an anodic corrosion inhibitor. 
     
     
         7 . The corrosion inhibitor as claimed in  claim 1  wherein the cellulose nanocrystals are positively charged and function as a cathodic corrosion inhibitor. 
     
     
         8 . The use of the inhibitor as claimed in  claim 1  in a paint formulation. 
     
     
         9 . A corrosion-inhibiting cutting fluid composite comprising:
 a cutting fluid; and   the corrosion inhibitor as claimed in  claim 1 .   
     
     
         10 . The cutting fluid as claimed in  claim 9 , wherein the charged cellulose nanocrystals fibrils are configured to be attracted to ionic components of a corroding metal surface. 
     
     
         11 . A process for inhibiting corrosion of metal equipment where water can reside, the process including adding an effective corrosion inhibiting amount of charged cellulose nanocrystals. 
     
     
         12 . The process as claimed in  claim 11 , further including dispersing the cellulose nanocrystals within the water. 
     
     
         13 . The process as claimed in  claim 11  further including causing the cellulose nanocrystals to be negatively charged, the cellulose nanocrystals so charged functioning as an anodic corrosion inhibitor. 
     
     
         14 . The process as claimed in  claim 13  including the step of causing the cellulose nanocrystals to be negatively charged via acid hydrolysis. 
     
     
         15 . The process as claimed in  claim 11  including the step of causing the cellulose nanocrystals to be in acid-form. 
     
     
         16 . The process as claimed in  claim 11  further including causing the cellulose nanocrystals to be positively charged, the cellulose nanocrystals so charged functioning as a cathodic corrosion inhibitor. 
     
     
         17 . The process as claimed in  claim 11  further including selectively causing a first set of the cellulose nanocrystals to be negatively charged, the first set of the cellulose nanocrystals so charged functioning as an anodic corrosion inhibitor, and selectively causing a second set of the cellulose nanocrystals to be positively charged, the second set of the cellulose nanocrystals so charged functioning as a cathodic corrosion inhibitor. 
     
     
         18 . The process as claimed in  claim 12  further including providing metal equipment that is ferrous. 
     
     
         19 . The use of charged cellulose nanocrystals as a corrosion inhibitor. 
     
     
         20 . A corrosion inhibitor consisting of a plurality of charged cellulose nanocrystals fibrils.

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