Organic-aqueous composition and process for forming corrosion-resistant coatings on metal surfaces
AssigneeE2KI & Associates Inc.
InventorHarold J. Gulley
Life of this patent
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Abstract
A two-part compositional mixture including a non-metallic concentrate with the appropriately blended requisite components in recommended amounts including HNO.sub.3 provides a single bath and dip process system. The inventive concentrate is a multifunctional metallic interface conversion system which includes a Tri-basic acid and/or a selection from, Mono-, Di-, Tri and/or Poly-Carboxylic acid or their ester or derivatives. The inventive compositional concentrate inhibits metallic corrosion through deposition of a protective coating/film on metallic surfaces which are exposed to atmospheric environments, water or water vapor.
Claims18
A non-toxic composition for imparting a corrosion resistant film on metallic surfaces, comprising:
- a) a first solution having the following ingredients mixed together in the percentages by weight of the total first solution as indicated:
- i) 3.33.times.10.sup.-5 to 16.6% Carboxymethylmercaptosuccinic acid;
- ii) 1.0.times.10.sup.-5 to 5% styrene maleic anhydride;
- iii) 1.67.times.10.sup.-5 to 8.35% NaHSO.sub.3 ;
- iv) 0.67.times.10.sup.-5 to 3.35% NaNO.sub.2 ;
- v) 0.415.times.10.sup.-5 to 2.083% HCl;
- vi) 0.83.times.10.sup.-5 to 4.15% Sodium Dimethyldithiocarbamate;
- vii) 2.5.times.10.sup.-5 to 12.5% Disulfonated Alkyl Diphenyl Oxide;
- viii) 2.67.times.10.sup.-5 to 13.35% NaNO.sub.3 ;
- ix) Balance H.sub.2 O;
- b) a second solution having 2.5.times.10.sup.-5 to 12.5% by weight Sodium Silicate and the balance H.sub.2);
- c) said composition being prepared by adding 0.02% to 0.05% by volume of said first solution to a volume of water and mixing, thereafter adding 0.2% to 0.8% by volume of HNO.sub.3 to said volume of water and mixing, and thereafter adding 2% and 4% by volume of said second solution in said volume of water and mixing, whereby said composition is formed.
A non-toxic composition for imparting a corrosion resistant film on metallic surfaces, comprising:
- a) a first solution having the following ingredients mixed together in the percentages by weight of the total first solution as indicated:
- i) 0.33% Carboxymethylmercaptosuccinic acid;
- ii) 0.1% styrene maleic anhydride;
- iii) 0. 00167% NaHSO.sub.3 ;
- iv) 0.067 % NaNO.sub.2 ;
- v) 0.0415% HCl;
- vi) 0. 0415% HNO.sub.3 ;
- vii) 0.083% Sodium Dimethyldithiocarbamate;
- viii) 0.25% Disulfonated Alkyl Diphenyl Oxide;
- ix) 0. 267% NaNO.sub.3 ;
- x) 98. 81833% H.sub.2 O;
- b) a second solution including 0.25% by weight Sodium Silicate and 99.75% water;
- c) said composition being prepared by adding 0.02% to 0.05% by volume of said first solution to a volume of water and mixing, thereafter adding 0.2% to 0.8% by volume of HNO.sub.3 to said volume of water and mixing, and thereafter adding 2% to 4% by volume of said second solution in said volume of water and mixing, whereby said composition is formed.
Dependencies are inferred from the claim text.