DMC:V2500-00-70-33-05-00A-647A-D|Issue No:003.00|Issue Date:2016-05-01
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.).
Common Information
TASK 70-33-05-300-503 Nickel Plating On Steel (Not Stainless)
Introduction
This procedure specifies the method to apply nickel electroplate to steel. It must not be used to apply nickel electroplate to stainless steel.
Safety Precautions
Cyanide solution precautions
Refer to Safety Conditions section for warnings.
If you breathe hydrocyanic gas
If cyanide or hydrocyanic gas absorbs through your skin.
Warning indications of poisoning
Dizziness, nausea, general weakness, and headache
Feeling of suffocation and tightness in the throat
Pallor, deep breathing, and unconsciousness.
Sodium hydroxide solution precautions
Refer to Safety Conditions section for warnings.
Acid solution precautions
Refer to Safety Conditions section for warnings.
Nitric, sulfuric or hydrofluoric acid solution precautions
Refer to Safety Conditions section for warnings.
Preliminary Requirements
Pre-Conditions
NONESupport Equipment
NONEConsumables, Materials and Expendables
NONESpares
NONESafety Requirements
WARNING
IT IS THE RESPONSIBILITY OF THE OPERATOR TO OBTAIN AND OBSERVE THE MANUFACTURER'S MATERIAL SAFETY DATA SHEETS FOR CONSUMABLE MATERIALS INFORMATION SUCH AS, HAZARDOUS INGREDIENTS, PHYSICAL/CHEMICAL CHARACTERISTICS, FIRE, EXPLOSION, REACTIVITY, HEALTH HAZARD DATA, PRECAUTIONS FOR SAFE HANDLING, USE AND CONTROL MEASURES AND ALSO TO TAKE LOCAL REGULATIONS INTO CONSIDERATION.
THIS PROCEDURE INCLUDES THE USE OF SODIUM HYDROXIDE, SODIUM CYANIDE OR POTASSIUM CYANIDE. CYANIDE SALTS AND/OR SOLUTIONS ARE VERY POISONOUS AND WORK VERY QUICKLY. THEY GIVE OFF HYDROCYANIC GAS, WHICH CAN KILL WHEN MIXED WITH ACID. THE PRECAUTIONS THAT FOLLOW MUST ALWAYS BE OBEYED.
CYANIDE SALTS AND SOLUTIONS MUST ALWAYS BE KEPT AWAY FROM ACIDS.
SODIUM HYDROXIDE SOLUTIONS MUST ALWAYS BE KEPT AWAY FROM THE SKIN AND EYES, BECAUSE THEY CAN BURN.
WARNING
OPERATORS MUST ALWAYS USE THE APPROVED PROTECTIVE CLOTHING SUPPLIED.
WARNING
FINGERNAILS MUST BE KEPT SHORT AND MUST ALWAYS BE FULLY CLEANED BEFORE YOU EAT, DRINK, OR SMOKE.
WARNING
ITEMS THAT ARE USED TO EAT OR DRINK WITH MUST NOT BE KEPT AT LOCATIONS WHERE CYANIDE IS KEPT OR USED. ALSO, YOU MUST NOT EAT, DRINK, OR SMOKE AT SUCH LOCATIONS.
WARNING
CYANIDE MUST ALWAYS BE KEPT AT A SAFE LOCATION, WHERE ACCESS IS ONLY AVAILABLE TO APPROVED PERSONS.
WARNING
A SUPPLY OF CYANIDE ANTIDOTE MUST ALWAYS BE EASILY AVAILABLE.
WARNING
THE INSTRUCTIONS GIVEN BY THE SAFETY OFFICER MUST ALWAYS BE OBEYED.
WARNING
THE OPERATORS MUST ALWAYS WEAR THE PROTECTIVE CLOTHING SUPPLIED, WHICH INCLUDES RUBBER GLOVES AND EYE PROTECTION.
WARNING
IMMEDIATELY REMOVE SOLUTION IN THE EYES. SUFFICIENTLY FLUSH THE EYES WITH WATER TO REMOVE CONTAMINATION. GET MEDICAL AID IMMEDIATELY.
WARNING
A SUPPLY OF BUFFERED PHOSPHATE SOLUTION MUST ALWAYS BE EASILY AVAILABLE, TO APPLY TO BURNS.
WARNING
CARE MUST BE TAKEN WHEN YOU ADD COMPOUNDS THAT CONTAIN SOLID SODIUM HYDROXIDE TO WATER, BECAUSE HEAT IS GIVEN OUT WHEN THE COMPOUND DISSOLVES. MAKE MUCH MOVEMENT OF THE SOLUTION, WITH AIR OR MECHANICAL METHODS, AS YOU ADD THE COMPOUND TO THE SURFACE OF THE SOLUTION. DO NOT ADD LARGE QUANTITIES OF THE COMPOUND TO ONE SMALL AREA OF THE TANK, BECAUSE THE SOLUTION WILL BOIL.
WARNING
ALL INSTRUCTIONS GIVEN BY THE SAFETY OFFICER MUST BE OBEYED.
WARNING
THE OPERATORS MUST ALWAYS WEAR THE PROTECTIVE CLOTHING SUPPLIED, WHICH INCLUDES RUBBER GLOVES AND EYE PROTECTION.
WARNING
IF ACID SOLUTIONS GET INTO THE EYES, FULLY FLUSH THEM WITH CLEAN WATER, THEN GET MEDICAL AID IMMEDIATELY.
WARNING
EVERY POSSIBLE PRECAUTION MUST BE TAKEN TO KEEP SOLUTIONS AWAY FROM THE EYES AND BARE SKIN. OPERATORS MUST WEAR PROTECTIVE CLOTHING (THIS INCLUDES RUBBER GLOVES AND GOGGLES) WHEN THEY PREPARE AND USE ACID SOLUTIONS. BE SURE TO REGULARLY EXAMINE RUBBER GLOVES FOR PIN HOLES AND REPLACE THE GLOVES, IF NECESSARY.
WARNING
SAFETY NOTICES MUST BE IN A POSITION THAT THE OPERATOR CAN EASILY SEE.
WARNING
EYE-WASH BOTTLES AND HYDROFLUORIC ACID (HF) BURN JELLY MUST BE AS CLOSE AS POSSIBLE TO THE OPERATOR'S WORK AREA.
WARNING
IF CONTAMINATION OF THE SKIN OCCURS, FLUSH THE SKIN WITH A LARGE QUANTITY OF CLEAN WATER.
WARNING
FOR ALL BURNS, HOWEVER SLIGHT, IT IS IMPORTANT TO GET MEDICAL AID IMMEDIATELY.
WARNING
MEDICAL PERSONNEL MUST BE TOLD WHICH SOLUTION (THE ACIDS INVOLVED) HAS CAUSED THE BURN PARTICULARLY IF HYDROFLUORIC ACID IS A CONSTITUENT.
Procedure
SUBTASK 70-33-05-300-001 Procedure for Nickel Plating on Steel (Not Stainless)
NOTE
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. This two-step procedure 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 over nickel which has been in service or to be used to exceed Engine Manual limits for plating thickness.
Apply a mask to the areas not to be stripped.
CAUTION
FOR PARTS WITH A WAX MASK, THE MAXIMUM TEMPERATURE IS 135 DEG F (57 DEG C) SO AS NOT TO MELT THE WAX FROM THE MASKED AREAS.
Alkali clean the parts for 1 to 3 minutes by one of the subsequent methods. The current must be off when the parts go in or out off the solution.
Alkali clean the parts with one of these solutions at 25 to 35 ASF (that is, 25 to 35 amperes/square foot). Use a periodic reverse cycle of 10 seconds on anodic and 10 seconds on cathodic. Complete the cycle on anodic at 110 to 130 deg F (43 to 54 deg C).
Solution Code 48 alkali smut removal solution.
Solution Code 58 alkali cleaner (heavy duty, phosphate-free).
Solution Code 137 electrolytic cleaner (heavy duty) phosphate-free and cyanide-free solution.
Solution Code 154 electrolytic cleaner solution (cyanide type, phosphate-free).
Solution Code 156 alkali smut removal solution.
Alkali clean the parts with one of these solutions at 10 to 15 ASF (that is, 10 to 15 amperes/square foot), on anodic only, at 110 to 130 deg F (43 to 54 deg C). The current must be off when the parts go in or out of the solution.
Solution Code 39 alkali cleaner solution (heavy duty).
Solution Code 47 alkali cleaner solution (medium duty).
Solution Code 165 electrolytic cleaner solution (noncyanide).
Solution Code 169 electrolytic cleaner solution (noncyanide).
Flush the parts in clean water, at room temperature, for 30 seconds.
CAUTION
SOLUTION CODE 54 NICKEL STRIP SOLUTION (CYANIDE), SOLUTION CODE 56 STRIP SOLUTION, SOLUTION CODE 59 NICKEL STRIP SOLUTION (NONCYANIDE), OR SOLUTION CODE 60 NICKEL STRIP SOLUTION (CYANIDE) MUST NOT BE USED TO REMOVE THE NICKEL PLATE FROM SILVER AND COPPER ALLOY BRAZED PARTS.
CAUTION
BECAUSE THIS PROCEDURE WILL REMOVE OTHER COATINGS, IT IS VERY IMPORTANT TO APPLY A MASK TO PLATED AREAS WHICH ARE NOT TO BE REMOVED. ALL HARD FACE COATINGS CAN ALSO BE DAMAGED OR REMOVED. ALL SUCH SURFACES MUST BE EXAMINED AND REPAIRED BEFORE THE NICKEL PLATE IS APPLIED AGAIN.
CAUTION
IF PARTS ARE MASKED WITH WAX, THE TEMPERATURE MUST NOT BE MORE THAN 135 DEG F (57 DEG C) SO AS NOT TO MELT THE WAX FROM THE MASKED AREAS.
Remove (strip) the nickel plating by one of these steps:
Put the parts fully in one of these solutions at a maximum temperature of 120 deg F (49 deg C) for the necessary amount of time:
Solution Code 54 nickel strip solution (cyanide).
Solution Code 56 strip solution.
Solution Code 59 nickel strip solution (noncyanide).
NOTE
To extend the life of these solutions, decrease their temperature to room temperature when they are not in use.
Put the parts fully in Solution Code 59 nickel strip solution (noncyanide) at a temperature of 100 to 120 deg F (38 to 49 deg C) for the necessary amount of time.
Put the parts fully in Solution Code 166 nickel strip solution (noncyanide) at a temperature of 120 to 150 deg F (49 to 66 deg C) for the necessary amount of time.
Put the parts fully in one of these solutions at 125 to 175 deg F (52 to 79 deg C) for the necessary amount of time.
Solution Code 57 nickel strip solution (noncyanide) (for silver or copper alloy brazed parts).
Solution Code 61 nickel strip solution (noncyanide) (for silver or copper alloy brazed parts).
Solution Code 68 nickel strip solution (noncyanide) (for silver or copper alloy brazed parts).
Flush the parts in clean water, at room temperature, for 30 seconds.
Examine the parts, to make sure that all the plating is fully removed.
Flush the parts in clean hot water at a minimum temperature of 140 deg F (60 deg C) for 30 seconds.
Dry the parts with compressed air.
Parts with a hardness value of Rockwell C40 or higher, which were repaired by grinding or machining, must be heat-treated at 275 to 325 deg F (135 to 163 deg C) for 2 hours.
Flush the parts in clean water, at room temperature, for 30 seconds.
CAUTION
IF PARTS ARE MASKED WITH A WAX, THE TEMPERATURE MUST NOT BE MORE THAN 135 DEG F (57 DEG C) SO AS NOT TO MELT THE WAX FROM MASKED AREAS.
Alkali clean the parts by one of the subsequent methods for 1 to 3 minutes. The current must be off when parts go in or out of the solution.
Alkali clean the parts with one of these solutions at 25 to 35 ASF (that is, 25 to 35 amperes/square foot). Use a periodic reverse cycle of 10 seconds on anodic and 10 seconds on cathodic. Complete the cycle on anodic at 110 to 130 deg F (43 to 54 deg C).
Solution Code 48 alkali smut removal solution.
Solution Code 58 alkali cleaner (heavy duty, phosphate-free).
Solution Code 137 electrolytic cleaner (heavy duty) phosphate-free and cyanide-free solution.
Solution Code 154 electrolytic cleaner solution (cyanide type, phosphate-free).
Solution Code 156 alkali smut removal solution.
Alkali clean the parts with one of these solutions at 10 to 15 ASF (that is, 10 to 15 amperes/square foot) on anodic only, at 100 to 130 deg F (43 to 54 deg C):
Solution Code 39 alkali cleaner solution (heavy duty).
Solution Code 47 alkali cleaner solution (medium duty).
Solution Code 165 electrolytic cleaner solution (noncyanide).
Solution Code 169 electrolytic cleaner solution (noncyanide).
Flush the parts in clean water, at room temperature, for 30 seconds.
Put the parts fully in one of these etching solutions, at room temperature, by one of the subsequent steps:
Put the parts fully in Solution Code 36 hydrochloric acid solution - 65 percent on anodic at 200 ASF (that is, 200 amperes/square foot) minimum for 2 to 2.5 minutes and on cathodic at 50 ASF (that is, 50 amperes/square foot) minimum for 5 to 10 seconds.
Put the parts fully in one of these solutions on anodic at 200 ASF minimum (that is, 200 amperes/square foot) minimum for 2 to 2.5 minutes and on cathodic at 50 ASF (50 amperes/square foot) minimum for 5 to 10 seconds:
Solution Code 29 sulfuric acid solution - 20 percent.
Solution Code 31 sulfuric acid solution - 40 percent.
Solution Code 34 sulfuric acid solution - 10 percent.
Solution Code 37 sulfuric-hydrofluoric acid solution.
Solution Code 46 acid salt solution.
For finish plated parts, put parts in one of the solutions in step (b) above or in Solution Code 27 hydrochloric acid solution - 20 percent with no current at 90 to 110 deg F (32 to 43 deg C) for 48 seconds after gassing starts. If this procedure is used, do not do steps (18) thru (21).
Flush the parts in clean water, at room temperature, for 30 seconds.
Alkali clean the parts with one of the subsequent solutions at 25 to 35 ASF (that is, 25 to 35 amperes/square foot) for 2 to 3 minutes. Use a periodic reverse cycle of 10 seconds on anodic and 10 seconds on cathodic. Complete the cycle on anodic at 110 to 130 deg F (43 to 54 deg C). The current must be off when the parts are put in or out of the solution.
Solution Code 48 alkali smut removal solution.
Solution Code 58 alkali cleaner (heavy duty, phosphate-free).
Solution Code 137 electrolytic cleaner (heavy duty) phosphate-free and cyanide-free solution.
Solution Code 154 electrolytic cleaner solution (cyanide type, phosphate-free).
Solution Code 156 alkali smut removal solution.
Flush the parts in clean water, at room temperature, for 30 seconds.
Put the parts fully in one of these etching solutions, with no current, at room temperature, for 30 to 60 seconds.
Solution Code 36 hydrochloric acid solution - 65 percent.
Solution Code 29 sulfuric acid solution - 20 percent.
Solution Code 31 sulfuric acid solution - 40 percent.
Solution Code 37 sulfuric-hydrofluoric acid solution.
Solution Code 46 acid salt solution.
Solution Code 170 sulfuric acid solution - 30 percent.
Flush the parts in clean water, at room temperature, for 30 seconds.
Put the parts fully in Solution Code 55 soft nickel plating solution (sulfamate) at 25 to 75 ASF (that is, 25 to 75 amperes/square foot) at 115 to 130 deg F (46 to 54 deg C) as necessary. The current must be on, when the parts go in the solution. The plating rate is approximately 0.002 inch (0.05 mm) for each hour at 40 ASF (that is, 40 amperes/square foot).
Flush the parts in clean water, at room temperature, for 30 seconds.
Put the parts fully into one of these neutralizing solutions, at room temperature, for 30 to 90 seconds.
Solution Code 35 sodium hydroxide - 3 percent.
Solution Code 39 heavy duty alkali cleaner solution.
Solution Code 41 chromium strip solution.
Solution Code 47 alkali cleaner solution (medium duty).
Solution Code 58 alkali cleaner solution (heavy duty, phosphate-free).
Solution Code 165 electrolytic cleaner solution (noncyanide).
Solution Code 137 electrolytic cleaner (heavy duty), phosphate-free and cyanide-free solution.
Solution Code 154 electrolytic cleaner solution (cyanide type, phosphate-free).
Solution Code 169 electrolytic cleaner solution (noncyanide).
Flush the parts in clean water, at room temperature, for 30 seconds.
Flush the parts in clean water, at room temperature, for 30 seconds.
Flush the parts in clean hot water at a minimum temperature of 140 deg F (60 deg C) for 30 seconds.
Dry the parts with compressed air, for 1 minute.
Examine the nickel plate. Refer to Step.
For parts that were cold worked after heat treatment or those with a hardness value of Rockwell C25 or higher heat treated at 350 deg F to 400 deg F (177 deg C to 204 deg C) for 3 hours. For parts that will get damaged if temperatures are more than 375 deg F (191 deg C), heat treat at 250 deg F to 300 deg F (121 deg C to 149 deg C) for 5 hours.
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.
Requirements After Job Completion
Follow-On Conditions
NONE
