Export Control
EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.Copyright
© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).Applicability
All
Common Information
TASK 70-33-06-300-503 Stripping And Plating Of Nickel On Stainless Steel, Cobalt And Nickel Base Alloys
Introduction
This two-step procedure to apply nickel is applicable for both rotating and non-rotating parts but is restricted to new nickel on top of new nickel. It is not for application of nickel onto nickel which has been in service or to be used to exceed Engine Manual limits for plating thickness.
The nickel plate can be applied in two applications, machining between applications, if necessary, if the nickel is reactivated. Proof of adhesion will be demonstrated by final machining.
For the make-up of the solutions refer to the SPM TASK 70-33-27-330-501 and for control to the SPM TASK 70-33-06-200-502.
NOTE
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
NONEConsumables, Materials and Expendables
| Name | Manufacturer | Part Number / Identification | Quantity | Remark |
|---|---|---|---|---|
| CoMat 02-008 PUMICE POWDER | 41753 | CoMat 02-008 | ||
| CoMat 02-054 BRUSH, TAMPICO | 045J7 | CoMat 02-054 | ||
| CoMat 02-056 BRUSH, NYLON | 045J7 | CoMat 02-056 | ||
| CoMat 02-058 BRUSH, TAMPICO | 045J7 | CoMat 02-058 | ||
| CoMat 02-060 BRUSH, NYLON | 0XY90 | CoMat 02-060 |
Spares
NONESafety Requirements
WARNING
Procedure

CAUTION
IF YOU USE WAX FOR A MASK, MAKE A SELECTION OF A WAX THAT WILL NOT MELT OR GET SOFT DURING THE PROCEDURE.Apply a mask to the areas not to be removed. Refer to the SPM TASK 70-38-24-380-501.
Solution Code 48 alkali smut removal solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-024.
Solution Code 58 alkali cleaner solution (heavy duty, phosphate-free), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-034.
Solution Code 137 electrolytic cleaner solution (heavy duty) phosphate-free and cyanide-free, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-062.
Solution Code 154 electrolytic cleaner solution (cyanide-type, phosphate-free), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-069.
Solution Code 156 alkali smut removal solution, made up by the SPM TASK 70-33-27-330-501, SUBTASK 70-33-27-180-071.
Anodic-Cathodic Alkali Clean Procedure.
Solution Code 39 alkali cleaner solution (heavy duty), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-015.
Solution Code 47 alkali cleaner solution (medium duty), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-023.
Solution Code 165 electrolytic cleaner solution (noncyanide), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-072.
Solution Code 169 electrolytic cleaner solution (noncyanide), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-077.
Anodic Alkali Clean Procedure (Alternative).
NOTE
The current must be OFF when parts go in or out of the solution.Electrolytically clean the parts with an alkali solution by one of the subsequent steps:
Solution Code 54 nickel strip solution (cyanide), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-030.
Solution Code 56 strip solution (cyanide), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-032.
Solution Code 60 nickel strip solution (cyanide), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-036.

CAUTION
SOLUTION CODE 28, SOLUTION CODE 54, SOLUTION CODE 56, SOLUTION CODE 59, OR SOLUTION CODE 60 THAT FOLLOW MUST NOT BE USED TO REMOVE THE NICKEL PLATE FROM SILVER AND COPPER ALLOY BRAZED PARTS.BECAUSE THIS PROCEDURE WILL REMOVE OTHER METALS, IT IS VERY IMPORTANT TO APPLY A MASK TO PLATED AREAS WHICH ARE NOT TO BE REMOVED. ALL HARDFACE COATINGS CAN ALSO BE DAMAGED OR REMOVED. ALL SUCH SURFACES MUST BE EXAMINED AND REPAIRED, BEFORE THE NICKEL PLATE IS APPLIED AGAIN.NOTE
For alternative stripping limits and solutions, refer to the subsequent step.Put the parts fully in one of these stripping solutions at a maximum temperature of 120 deg F (49 deg C), for the necessary time:

CAUTION
TO PREVENT DAMAGE, DO NOT USE SOLUTION CODE 28 ON PARTS THAT CONTAIN A MINIMUM OF 10 PERCENT MOLYBDENUM.Solution Code 28 nitric acid - 50 percent, made up by the SPM TASK 70-33-27-330-501, SUBTASK 70-33-27-180-004, at 68 to 77 deg F (20 to 25 deg C) for the necessary time.
Solution Code 59 nickel strip solution (noncyanide), made up by the SPM TASK 70-33-27-330-501, SUBTASK 70-33-27-180-035, at 100 to 120 deg F (38 to 49 deg C) for the necessary time.

CAUTION
IF YOU USE WAX FOR A MASK, MAKE A SELECTION OF A WAX THAT WILL NOT MELT OR GET SOFT DURING THE PROCEDURE.Solution Code 166 nickel strip solution (noncyanide), made up by the SPM TASK 70-33-27-330-501, SUBTASK 70-33-27-180-075, at 120 to 150 deg F (49 to 66 deg C) for the necessary time.
Solution Code 57 nickel strip solution (noncyanide)(for silver or copper alloy brazed parts), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-033.
Solution Code 61 nickel strip solution (noncyanide)(for silver alloy brazed parts), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-037.
Solution Code 68 nickel strip solution (noncyanide)(for silver or copper brazed parts), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-044.

CAUTION
IF YOU USE WAX FOR A MASK, MAKE A SELECTION OF A WAX THAT WILL NOT MELT OR GET SOFT DURING THE PROCEDURE.NOTE
Decrease the temperature of each of the subsequent solutions to 68 to 77 deg F (20 to 25 deg C) when not in use, to increase the life of each solution.One of these nickel strip solutions (noncyanide) at 125 to 175 deg F (52 to 79 deg C) for the necessary time:
Alternatively, put the parts fully in one of these stripping solutions:
If necessary, apply a corrosion preventive. Refer to the SPM TASK 70-38-37-300-503.
If necessary, remove grease and oil from the parts. Refer to the SPM TASK 70-11-03-300-503.
If necessary, apply a mask. Refer to the SPM TASK 70-38-24-380-501.
Solution Code 48 alkali smut removal solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-024.
Solution Code 58 alkali cleaner solution (heavy duty, phosphate-free), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-034.
Solution Code 137 electrolytic cleaner solution (heavy duty) phosphate-free and cyanide-free, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-062.
Solution Code 154 electrolytic cleaner solution (cyanide-type, phosphate-free), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-069.
Solution Code 156 alkali smut removal solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-071.
Anodic-Cathodic Alkali Clean Procedure.
Solution Code 39 alkali cleaner solution (heavy duty), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-015.
Solution Code 47 alkali cleaner solution (medium duty), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-023.
Solution Code 165 electrolytic cleaner solution (noncyanide), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-072.
Solution Code 169 electrolytic cleaner solution (noncyanide), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-077.

CAUTION
TO PREVENT DAMAGE, ALTERNATIVE SOLUTION CODE 39, SOLUTION CODE 47, SOLUTION CODE 165, OR SOLUTION CODE 169 MUST NOT BE USED ON PARTS THAT CONTAIN A MINIMUM OF 10 PERCENT MOLYBDENUM.
CAUTION
IF YOU USE WAX FOR A MASK, MAKE A SELECTION OF A WAX THAT WILL NOT MELT OR GET SOFT DURING THE PROCEDURE.Anodic Alkali Clean Procedure.
Electrolytically clean the parts with an alkali solution by one of the subsequent procedures:
Solution Code 31 sulfuric acid solution - 40 percent, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-007.
Solution Code 36 hydrochloric acid solution - 65 percent, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-012.
Solution Code 37 sulfuric-hydrofluoric acid solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-013.
Solution Code 46 acid salt solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-022.
Put the parts fully in one of the subsequent etching solutions at 68 to 77 deg F (20 to 25 deg C) for one minute with current on anodic at 60 ASF.

CAUTION
TO PREVENT DAMAGE, DO NOT USE SOLUTION CODE 31, SOLUTION CODE 36, SOLUTION CODE 37, OR SOLUTION CODE 46 ON PARTS THAT CONTAIN A MINIMUM OF 10 PERCENT MOLYBDENUM.NOTE
For alternative etching solutions and limits for Type 410 stainless steel parts being finished nickel plated, refer to the subsequent step.Etch parts with less than 10 percent molybdenum by the subsequent procedure:
Solution Code 31 sulfuric acid solution - 40 percent, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-007.
Solution Code 36 hydrochloric acid solution - 65 percent, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-012.
Solution Code 37 sulfuric-hydrofluoric acid solution made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-013.
Solution Code 46 acid salt solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-022.
Put parts fully in one of the subsequent etching solutions at 68 to 77 deg F (20 to 25 deg C) for two minutes with no current:
Solution Code 27 hydrochloric acid solution - 20 percent, made up by the SPM TASK 70-33-27-330-501, SUBTASK 70-33-27-180-003. If you use this solution, ignore the subsequent flush and smut removal steps.
Put parts fully in the subsequent etching solution at 90 to 100 deg F (32 to 43 deg C) with no current:

CAUTION
TO PREVENT DAMAGE, DO NOT USE SOLUTION CODE 27, SOLUTION CODE 31, SOLUTION CODE 36, SOLUTION CODE 37, OR SOLUTION CODE 46 ON PARTS THAT CONTAIN A MINIMUM OF 10 PERCENT MOLYBDENUM.Alternatively, for Type 410 stainless steel parts being finished nickel plated, etch the parts by one to the subsequent procedures:
Solution Code 48 alkali smut removal solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-024.
Solution Code 58 alkali cleaner solution (heavy duty, phosphate-free), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-034.
Solution Code 137 electrolytic cleaner solution (heavy duty) phosphate-free and cyanide-free, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-062.
Solution Code 154 electrolytic cleaner solution (cyanide-type, phosphate-free), made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-069.
Solution Code 156 alkali smut removal solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-071.
NOTE
If smut removal is not complete, continue for approximately one minute at 25 to 35 ASF with periodic reverse cycle of 10 seconds on anodic and 10 seconds on cathodic. Complete the cycle on anodic.
Put the parts fully in one of these alkali solutions with the subsequent time, current, and temperature limits:
Solution Code 31 sulfuric acid - 40 percent, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-007.
Solution Code 36 hydrochloric acid solution - 65 percent, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-012.
Solution Code 37 sulfuric-hydrofluoric acid, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-013.
Solution Code 46 acid salt solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-022.
Put the parts fully in one of the subsequent etching solutions at 68 to 77 deg F (20 to 25 deg C) for 30 to 60 seconds with no current:
Solution Code 32 titanium etching solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-008.
Solution Code 33 nitric-hydrofluoric acid solution, made up by the SPM TASK 70-33-27-330-501 SUBTASK 70-33-27-180-009.
Solution Code 50 descaling solution, made up by TASK 70-33-27-330-501, SUBTASK 70-33-27-180-026.
If the above smut removal is not satisfactory on stainless steel, cobalt and nickel base parts only, put these parts fully in one of the subsequent etching solutions at 68 to 77 deg F (20 to 25 deg C) for 6 to 12 seconds with no current:
For parts with less than 10 percent molybdenum, remove the smut.
Fully clean the parts with pressure spray of water at 68 to 77 deg F (20 to 25 deg C) for one to three minutes. Use CoMat 02-008 PUMICE POWDER and one of the subsequent brushes:
For parts with a minimum of 10 percent molybdenum only, remove the smut by the subsequent steps:
Put the parts fully in etching Solution Code 50 descaling solution, made up by the SPM TASK 70-33-27-330-501, SUBTASK 70-33-27-180-026, at 68 to 77 deg F (20 to 25 deg C) for six to 12 seconds.
Solution Code 30 nickel strike solution, made up by the SPM TASK 70-33-27-330-501, SUBTASK 70-33-27-180-006, with these limits:
Solution Code 66 nickel sulfamate strike solution, made up by the SPM TASK 70-33-06-100-501, SUBTASK 70-33-06-100-005-A02 with these limits:
Put the parts fully in one of the subsequent nickel strike solutions:
Put the parts fully in Solution Code 55 soft nickel plating solution (sulfamate), made up by the SPM TASK 70-33-27-330-501, SUBTASK 70-33-27-180-031 witth these limits:
Examine the nickel plate. Refer to Step.
Apply a corrosion preventive to the parts, if necessary. Refer to the SPM TASK 70-38-37-300-503.
Remove grease and oil from the parts, if necessary. Refer to the SPM TASK 70-11-03-300-503.
NOTE
This post plate bake is not a requirement for parts that were nickel plated for the purpose of brazing.Do a visual inspection of the plated areas for finish, cracks and adhesion. Plating must have a constant color. No circumferential cracks are permitted. Rough or blistering areas are NOT permitted.
Inspection criteria for machined nickel plating are: the bond between the nickel plate and the base must be continuous. The plate must be smooth and constant in appearance. The plate must NOT have frosty areas, pinholes, nodules, blisters or other damage that can cause unsatisfactory performance.
Apply a corrosion preventive to the parts, if necessary. Refer to the SPM TASK 70-38-37-300-503.

CAUTION
ALWAYS MAKE SURE THAT PARTS MADE OF MATERIAL WHICH CONTAINS 10 OR MORE PERCENT OF MOLYBDENUM (FOR EXAMPLE, HASTELLOY W) ARE PREPARED AS SPECIFIED. THE SMUT REMAINING ON THE PARTS (BECAUSE OF THE QUANTITY OF MOLYBDENUM IN THE PARTS) MUST BE REMOVED BY A SPECIAL PROCEDURE, TO PREVENT A LOW BOND STRENGTH WHICH CAN OCCUR IN THE PLATE.Procedure.
SUBTASK 70-33-06-300-001 Procedure for Nickel Plating on Stainless Steel, Cobalt and Nickel Base Alloys
