TASK 70-11-08-100-501 Make-Up Of The Solutions To Etch Titanium Alloys

DMC:V2500-00-70-11-08-00A-081A-D|Issue No:003.00|Issue Date:2019-08-01

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.).

Applicability

All

Common Information

TASK 70-11-08-100-501 Make-Up Of The Solutions To Etch Titanium Alloys

Introduction

The purpose of this TASK is to give details of the etching solutions that can be used on titanium parts to prepare them for inspection.

To identify the consumable materials, refer to the Consumable Materials Index.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Hydrofluoric acid resistant equipmentLOCALHydrofluoric acid resistant equipment
Polyethylene or polypropylene tankLOCALPolyethylene or polypropylene tank

(or suitable Hydrofluoric acid resistant material) fitted with fume extraction

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADELOCALCoMat 01-025
CoMat 01-027 HYDROFLUORIC ACIDLOCALCoMat 01-027
CoMat 01-027A HYDROFLUORIC ACIDLOCALCoMat 01-027A
CoMat 01-030 SODIUM CARBONATE Na2CO3K0419CoMat 01-030
CoMat 01-086 AMMONIUM HYDROXIDE SOLN NH4OHK0419CoMat 01-086
CoMat 01-361 AMMONIUM CARBONATE (NH4)2CO3K6835CoMat 01-361

Spares

NONE

Safety Requirements

WARNING

IT IS THE RESPONSIBILITY OF THE OPERATOR TO OBTAIN AND OBSERVE THE MANUFACTURER'S MATERIAL SAFETY DATA SHEETS FOR CONSUMABLE MATERIAL SAFETY INFORMATION (SUCH AS HAZARDOUS INGREDIENTS; PHYSICAL/CHEMICAL CHARACTERISTICS; FIRE, EXPLOSION, REACTIVITY, AND HEALTH HAZARD DATA/ PRECAUTIONS FOR SAFE HANDLING; AND USE AND CONTROL MEASURES) AND ALSO TO TAKE LOCAL REGULATIONS INTO CONSIDERATION.

CAUTION

THIS PROCESS MUST ONLY BE USED WHEN SPECIFIED IN THE APPLICABLE ENGINE MANUAL. ALTERNATIVE ETCH SOLUTIONS ARE NOT PERMITTED.

CAUTION

IAE RECOMMENDS TO KEEP THE SOLUTION AT AMBIENT TEMPERATURE (BETWEEN 64 F AND 73 F (18 C TO 23 C), IF THE SOLUTION IS AT A GREATER TEMPERATURE, THE ETCH TIME MUST BE REDUCED.

Procedure

    1. SUBTASK 70-11-08-100-001 Make-Up of Hydrofluoric Acid/Ferric Sulfate

    1. This etch solution is deleted because it is not suitable for use as a swab etchant.

    2. SUBTASK 70-11-08-100-002 Make-Up of Hydrofluoric Acid/Nitric Acid Etch Solution

      1. Composition of the solution.

      1. Nitric acid HNO3 (SG 1.42): 180 g/l to 220 g/l (24.0 oz.wt/gal to 29.4 oz.wt/gal).

      2. Hydrofluoric acid HF: 45 g/l to 55 g/l (6.0 oz.wt/gal to 7.3 oz.wt/gal).

      2. Make-up for 1 liter (34 fl.oz) of solution.

      1. Put approximately 250 ml (8.45 fl.oz) of water into a Polyethylene or polypropylene tank or suitable material tank of more than 1 liter capacity.

      2. Add, slowly and carefully, 200 ml (6.76 fl.oz) of CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADE.

        3. Add the applicable volume of hydrofluoric acid:

          1. For CoMat 01-027 HYDROFLUORIC ACID (30 percent HF w/w):

          1. Add, slowly and carefully, 150 ml (5.07 fl.oz) of CoMat 01-027 HYDROFLUORIC ACID.

          2. For CoMat 01-027A HYDROFLUORIC ACID (40 percent HF w/w):

          1. Add, slowly and carefully, 110 ml (3.72 fl.oz) of CoMat 01-027A HYDROFLUORIC ACID.

      4. Stir to mix.

      5. Add, slowly and carefully, water up to the 1 liter level of the container.

      3. Make-up for 1 gallon (3.8 l) of solution.

      1. Put approximately 0.25 gal (0.9 l) of water into a Polyethylene or polypropylene tank or suitable material tank of more than 1 gal (3.8 l) capacity.

      2. Add, slowly and carefully, 25.6 fl oz (757 ml) of CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADE.

        3. Add the applicable volume of hydrofluoric acid:

          1. For CoMat 01-027 HYDROFLUORIC ACID (30 percent HF w/w):

          1. Add, slowly and carefully, 19.2 fl oz (568 ml) of CoMat 01-027 HYDROFLUORIC ACID.

          2. For CoMat 01-027A HYDROFLUORIC ACID (40 percent HF w/w):

          1. Add, slowly and carefully, 14.08 fl oz (416 ml) of CoMat 01-027A HYDROFLUORIC ACID.

      4. Stir to mix.

      5. Add, slowly and carefully, water up to the 1 gal (3.8 l) level of the container.

    3. SUBTASK 70-11-08-100-003 Make-up of Nitric Acid/Hydrofluorosilicic Acid

    1. This etch solution is deleted because it is not suitable for use as a swab etchant.

    4. SUBTASK 70-11-08-100-004 Make-up of Nitric Acid/Potassium Fluoride

    1. This etch solution is deleted because it is not suitable for use as a swab etchant.

    5. SUBTASK 70-11-08-100-005 Make-up of Hydrofluoric Acid/Nitric Acid Desmutting Solution

      1. Composition of the solution.

      1. Nitric acid HNO3 (SG 1.42): 380 g/l to 420 g/l (50.7 oz.wt/gal to 56.1 oz.wt/gal).

      2. Hydrofluoric acid HF: 1.5 g/l to 2.5 g/l (0.2 oz.wt/gal to 0.3 oz.wt/gal).

      2. Make-up for 1 liter (0.3 gal) of solution.

      1. Put approximately 200 ml (6.76 fl.oz) of water into a Polyethylene or polypropylene tank or suitable material tank of more than 1 liter (0.3 gal) capacity.

      2. Add, slowly and carefully, 410 ml (13.9 fl.oz) of CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADE.

        3. Add the applicable volume of hydrofluoric acid:

          1. For CoMat 01-027 HYDROFLUORIC ACID (30 percent HF w/w):

          1. Add, slowly and carefully, 6 ml (0.2 fl.oz) of CoMat 01-027 HYDROFLUORIC ACID.

          2. For CoMat 01-027A HYDROFLUORIC ACID (40 percent HF w/w):

          1. Add, slowly and carefully, 4 ml (0.1 fl.oz) of CoMat 01-027A HYDROFLUORIC ACID.

      4. Stir to mix.

      5. Add, slowly and carefully, water up to the 1 liter (0.3 gal) level of the container.

      3. Make-up for 1 gallon (3.8 l) of solution.

      1. Put approximately 0.2 gal (0.8 l) of water into a Polyethylene or polypropylene tank or suitable material tank of more than 1 gal (3.8 l) capacity.

      2. Add, slowly and carefully, 52.48 fl oz (1552 ml) of CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADE.

        3. Add the applicable volume of hydrofluoric acid:

          1. For CoMat 01-027 HYDROFLUORIC ACID (30 percent HF w/w):

          1. Add, slowly and carefully, 0.768 fl oz (22.71 ml) of CoMat 01-027 HYDROFLUORIC ACID.

          2. For CoMat 01-027A HYDROFLUORIC ACID (40 percent HF w/w):

          1. Add, slowly and carefully, 0.512 fl oz (15.14 ml) of CoMat 01-027A HYDROFLUORIC ACID.

      4. Stir to mix.

      5. Add, slowly and carefully, water up to the 1 gallon (3.8 l) level of the container.

    6. SUBTASK 70-11-08-100-006 Make-up of Titanium Etch Neutralizing Solution

      1. Composition of the solution.

        1. The subsequent list gives the neutralizing solutions that are applicable to TASK 70-11-08-300-503.

          1. Ammonia Solution

          2. Sodium Carbonate Solution

          1. CoMat 01-030 SODIUM CARBONATE Na2CO3: 40 g/l to 60 g/l (5.3 oz.wt/gal to 8.0 oz.wt/gal).

          3. Ammonium Carbonate Solution

          1. CoMat 01-361 AMMONIUM CARBONATE (NH4)2CO3 40 to 60 g/l (5.3 to 8.0 oz.wt/gal).

      2. Make-up of solution.

      1. Use a suitable glass or plastic container that is larger than the necessary solution volume.

      2. Fill the container to approximately 50 percent of the necessary solution volume with clean water.

      3. Add the necessary quantity of the applicable CoMat chemical to the container.

      4. Stir to mix.

      5. Add clean water to the container to the level of the necessary solution volume.

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Update task per procedures Rolls-Royce OP 133 and OP 148 and clarify the neutralizing solution control requirements (CAS-38522-H4T6T8) (REA19VC136)

Manufacturer Code:K0419
Enterprise Name:FISHER SCIENTIFIC UK LTD
BU Name:FISHER SCIENTIFIC UK LTD
Street:BISHOP MEADOW RD
City:LOUGHBOROUGH
Province:LEICESTERSHIRE
Zip Code:LE11 5RG
Country:UNITED KINGDOM
Internet:https://www.fishersci.co.uk/gb/en/home.html
Manufacturer Code:K6835
Enterprise Name:MED-LAB LTD
BU Name:MED-LAB LTD
Street:COPELAND ST
City:DERBY
Zip Code:DE1 2PU
Country:GREAT BRITAIN
Phone Number:44-1332-349094
Fax Number:44-1332-371237
Email:sales@med-lab.co.uk
Internet:www.med-lab.co.uk
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:5FCA4
Supply Number:CoMat 01-025
Type:sp01
Supply Short Name:CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADE
Supply Name:CoMat 01-025 NITRIC ACID HNO3, TECHNICAL GRADE
Specification Groups:
Doc NumberType
orTECHNICAL GRADE SP.GR. 1.42 NITRIC ACID
orTECHNICAL GRADE 42 BAUME NITRIC ACID
TECHNICAL GRADE 67.5 WT% NITRIC ACID
Suppliers:
ManufacturerRemarks
5FCA4
K6835
LOCAL
U0PR4
U0SV8
U6726
V272V
Manufacturer Code:LOCAL
Supply Number:CoMat 01-027
Type:sp01
Supply Short Name:CoMat 01-027 HYDROFLUORIC ACID
Supply Name:CoMat 01-027 HYDROFLUORIC ACID
Specification Groups:
Doc NumberType
OMAT: 172 (RR REF)COMMERCIAL GRADE 30% W/W HF MIL-A-24641
JCR-044 (JAEC REF)COMMERCIAL GRADE 30% W/W HF MIL-A-24641
MTH 177 (38%-40%) (MTU REF)COMMERCIAL GRADE 30% W/W HF MIL-A-24641
Suppliers:
ManufacturerRemarks
LOCAL
K6835
70657
Manufacturer Code:LOCAL
Supply Number:CoMat 01-027A
Type:sp01
Supply Short Name:CoMat 01-027A HYDROFLUORIC ACID
Supply Name:CoMat 01-027A HYDROFLUORIC ACID
Specification Groups:
Doc NumberType
OMAT: 172A (RR REF)40% W/W HF MIL-A-24641
Suppliers:
ManufacturerRemarks
LOCAL
K6835
70657
Manufacturer Code:K0419
Supply Number:CoMat 01-030
Type:sp01
Supply Short Name:CoMat 01-030 SODIUM CARBONATE Na2CO3
Supply Name:CoMat 01-030 SODIUM CARBONATE Na2CO3
Specification Groups:
Doc NumberType
OMAT: 119 (RR REF)ANHYDROUS SODIUM CARBONATE, TECHNICAL GRADE, CERTIFIED TO B.S.3674:1981 (1992) OR TO A‐A‐59563 TYPE 2
Suppliers:
ManufacturerRemarks
K0419
K6835
LOCAL
U0SV8
U6726
V272V
Manufacturer Code:K0419
Supply Number:CoMat 01-086
Type:sp01
Supply Short Name:CoMat 01-086 AMMONIUM HYDROXIDE SOLN NH4OH
Supply Name:CoMat 01-086 AMMONIUM HYDROXIDE SOLN NH4OH
Specification Groups:
Doc NumberType
OMAT: 129 (RR REF)S.G 0.880 (APPROX. 35 PERCENT NH4) AMMONIUM HYDROXIDE SOLUTION, ANALYTICAL (UNIVAR®) GRADE
JCR-108 (JAEC REF)S.G 0.880 (APPROX. 35 PERCENT NH4) AMMONIUM HYDROXIDE SOLUTION, ANALYTICAL (UNIVAR®) GRADE
Suppliers:
ManufacturerRemarks
K0419
K6835
LOCAL
U0SV8
U6726
Manufacturer Code:K6835
Supply Number:CoMat 01-361
Type:sp01
Supply Short Name:CoMat 01-361 AMMONIUM CARBONATE
Supply Name:CoMat 01-361 AMMONIUM CARBONATE (NH4)2CO3
Specification Groups:
Doc NumberType
OMAT: 1/242 (RR REF)AMMONIUM CARBONATE, ANALYTICAL (UNIVAR®) GRADE
Suppliers:
ManufacturerRemarks
K6835
LOCAL
U6726
Manufacturer Code:LOCAL
Tool Number:Hydrofluoric acid resistant equipment
Tool Name:Hydrofluoric acid resistant equipment
Manufacturer Code:LOCAL
Tool Number:Polyethylene or polypropylene tank
Tool Name:Polyethylene or polypropylene tank