John Gary Huff

US Patent:

46816410, Jul 21, 1987

Filed:

May 16, 1985

Appl. No.:

6/735286

Inventors:

Ronald W. Zurilla - Farmington Hills MI
John Huff - Detroit MI

Assignee:

Ford Motor Company - Dearborn MI

International Classification:

C23C 2212
C23C 2213

US Classification:

148 615Z

Abstract:

A method for increasing the resistance to alkaline dissolution of a phosphate conversion coating on a corrodible metal surface by an improved zinc phosphate conversion coating together with articles coated by this method are disclosed. The substrate is exposed to the phosphating solution by spraying or immersion to chemically effect a reaction with the substrate. First divalent metal cations are selected from magnesium and transition metals having a hydroxide with lower solubility in alkaline solution than zinc hydroxide. The other source of necessary metal cations is zinc and its cations are herein termed second divalent metal cations. In the preferred embodiment, the first divalent metal cations comprise about 84 to about 94 mole percent of the total first and second divalent metal cations in the bath. The deposited coating has first divalent metal cations (chemically combined with phosphate ions) present in an amount of at least 15 mole percent of the total first and second divalent metal cations in the coating.

US Patent:

47131217, Dec 15, 1987

Filed:

Jan 20, 1987

Appl. No.:

7/005180

Inventors:

Ronald W. Zurilla - Farmington Hills MI
John Huff - Detroit MI

Assignee:

Parker Chemical Company - Madison Heights MI

International Classification:

C23C 206

US Classification:

4284723

Abstract:

A method for increasing the resistance to alkaline dissolution of a phosphate conversion coating on a corrodible metal surface by an improved zinc phosphate conversion coating together with articles coated by this method are disclosed. The substrate is exposed to the phosphating solution by spraying or immersion to chemically effect a reaction with the substrate. First divalent metal cations are selected from magnesium and transition metals having a hydroxide with lower solubility in alkaline solution than zinc hydroxide. The other source of necessary metal cations is zinc and its cations are herein termed second divalent metal cations. In the preferred embodiment, the first divalent metal cations comprise about 84 to about 94 mole percent of the total first and second divalent metal cations in the bath. The deposited coating has first divalent metal cations (chemically combined with phosphate ions) present in an amount of at least 15 mole percent of the total first and second divalent metal cations in the coating.

US Patent:

56318456, May 20, 1997

Filed:

Oct 10, 1995

Appl. No.:

8/541387

Inventors:

Dimitre P. Filev - Novi MI
Irena A. Nagisetty - Toledo OH
Alan E. Hyrila - Salem MI
John Huff - Southfield MI
Robert A. Sensoli - Livonia MI
John C. Cooper - Dearborn MI

Assignee:

Ford Motor Company - Dearborn MI

International Classification:

G01F 100

US Classification:

364510

Abstract:

A phosphate bath control system and method is provided that tracks the set points of one or more of the major process variables of the phosphate bath independently of variations in the production conditions. A detector determines the current values of Zinc, Manganese and Total Acid provides data to a controller which exponentially filters the data and processes the filtered data in accordance with fuzzy logic rules. The controller periodically updates the flow rate of one or more pumps that control the flow of liquid concentrates to the bath in order to maintain a desired concentration of the various constituents of the bath. Control of an accelerator is provided by incorporating in the controller an additional algorithm for indirect estimation of the accelerator concentration based on a math model which represents the material balance of the accelerator in the bath.

US Patent:

47227532, Feb 2, 1988

Filed:

Jan 20, 1987

Appl. No.:

7/005185

Inventors:

Ronald W. Zurilla - Farmington Hills MI
John Huff - Detroit MI

Assignee:

Parker Chemical Company - Madison Heights MI

International Classification:

C23C 2212

US Classification:

4284723

Abstract:

A method for increasing the resistance to alkaline dissolution of a phosphate conversion coating on a corrodible metal surface by an improved zinc phosphate conversion coating together with articles coated by this method are disclosed. The substrate is exposed to the phosphating solution by spraying or immersion to chemically effect a reaction with the substrate. First divalent metal cations are selected from magnesium and transition metals having a hydroxide with lower solubility in alkaline solution than zinc hydroxide. The other source of necessary metal cations is zinc and its cations are herein termed second divalent metal cations. In the preferred embodiment, the first divalent metal cations comprise aobut 84 to about 94 mole percent of the total first and second divalent metal cations in the bath. The deposited coating has first divalent metal cations (chemically combined with phosphate ions) present in an amount of at least 15 mole percent of the total first and second divalent metal cations in the coating.