Preliminary Requirements

Safety Requirements

WARNING

IT IS THE RESPONSIBILITY OF THE OPERATOR TO OBTAIN AND OBSERVE THE MANUFACTURER'S MATERIAL SAFETY DATA SHEETS FOR CONSUMABLE MATERIALS. THESE CONTAIN 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.

WARNING

IT IS VERY IMPORTANT TO TAKE EVERY POSSIBLE PRECAUTION TO PREVENT CHEMICAL (SOLID OR SOLUTION) CONTACT WITH THE EYES OR BARE SKIN. WEAR APPROPRIATE PROTECTIVE CLOTHING, WHICH INCLUDES GOGGLES AND RUBBER GLOVES, WHEN YOU MAKE UP AND USE THE SOLUTIONS IN THIS PROCEDURE. EXAMINE RUBBER GLOVES REGULARLY FOR PIN HOLES AND REPLACED AND DISCARD THEM AS NECESSARY. KEEP EYE-WASH BOTTLES AND OTHER APPLICABLE FIRST AID EQUIPMENT AS CLOSE AS POSSIBLE TO THE WORK AREA.

IF CONTAMINATION OF THE EYES OCCURS, FLUSH THE EYES IMMEDIATELY WITH WATER, SUFFICIENT TO REMOVE THE CONTAMINATION. GO FOR MEDICAL TREATMENT IMMEDIATELY.

IF CONTAMINATION OF THE SKIN OCCURS, CLEAN YOUR SKIN WITH A LARGE QUANTITY OF CLEAN WATER THAT FLOWS.

WARNING

ALL BURNS, LARGE OR SMALL, MUST BE EXAMINED TO AT THE NEAREST FIRST AID POST.

WARNING

THE FIRST AID POST MUST BE TOLD WHICH SOLUTION (FOR EXAMPLE, THE ACIDS INVOLVED) CAUSED THE BURN.

WARNING

FINGER NAILS MUST BE KEPT SHORT AND MUST ALWAYS BE FULLY CLEANED BEFORE YOU EAT, DRINK OR SMOKE. YOU MUST NOT EAT, DRINK OR SMOKE, AT PLACES WHERE CHEMICALS ARE KEPT OR USED. ITEMS THAT ARE USED TO EAT OR DRINK WITH MUST NOT BE KEPT AT LOCATIONS WHERE CHEMICALS ARE KEPT OR USED.

WARNING

SAFETY NOTICES MUST ALWAYS BE PUT IN LOCATIONS WHERE THEY CAN BE EASILY SEEN.

WARNING

CYANIDE SALTS AND/OR SOLUTIONS ARE EXTREMELY RAPID POISONS AND RELEASE DEADLY HYDRO-CYANIC GAS IN CONTACT WITH ACIDS.

WARNING

CYANIDE SALTS AND SOLUTIONS MUST BE KEPT APART FROM ACIDS.

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

FUME EXTRACTION IS ESSENTIAL.

WARNING

CHROMIC ACID SPRAY IS DANGEROUS IF INHALED, BECAUSE IT CAUSES ULCERS IN THE NOSE AND, IN SOME CASES, PERFORATION OF THE NASAL SEPTUM. CHROMIC ACID SALTS AND SOLUTIONS IN CONTACT WITH THE SKIN CAN CAUSE CHROME SORES. ULCERS CAN FORM IF CHROMIC ACID GETS IN TO CUTS AND ABRASIONS. CUTS AND ABRASIONS, WHICH DO NOT HEAL, MUST BE REPORTED, IMMEDIATELY, TO THE MEDICAL DEPARTMENT.

WARNING

CHROMIC ACID MUST NOT BE USED UNLESS THE FUME EXTRACTION PLANT IS IN OPERATION AND IS FULLY SERVICEABLE.

WARNING

PROTECTIVE CLOTHING MUST BE WORN, THAT IS, PROTECTIVE GLOVES, OVERALLS, GOGGLES OR FACE VISOR AND SAFETY SHOES OR BOOTS. BARRIER CREAM MUST BE APPLIED TO THE HANDS AND FOREARMS BEFORE YOU START WORK.

WARNING

SMOKING AND THE CONSUMPTION OF FOOD NEAR THE CHROMIC ACID BATH ARE PROHIBITED.

WARNING

CHROMIC ACID IS STRONGLY OXIDIZING AND HAS SOME FIRE RISK (THAT IS, POSSIBLE SPONTANEOUS COMBUSTION OF ORGANIC MATERIALS). COMBUSTIBLE MATERIALS INCLUDE RAGS AND SAWDUST, WHICH HAVE ABSORBED CHROMIC ACID SOLUTION. SUCH CONTAMINATED MATERIALS MUST BE PUT FULLY IN A SOLUTION OF SODIUM BISULFITE TO MAKE NEUTRAL THE CHROMIC ACID; THEN DISCARD THE SOLUTION AS SPECIAL WASTE. THE SOLID MATERIAL MUST THEN BE FLUSHED WITH WATER BEFORE DISPOSAL.

WARNING

CARE MUST BE TAKEN WHEN YOU ADD COMPOUNDS WHICH CONTAIN SOLID SODIUM HYDROXIDE TO WATER, BECAUSE HEAT IS GIVEN OFF 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.

CAUTION

SOME PROCEDURES IN THIS TASK RELEASE HYDROGEN DURING COATING REMOVAL. THIS CAN CAUSE HYDROGEN EMBRITTLEMENT CRACKING. THUS STEEL PARTS WITH A TENSILE STRENGTH OF MORE THAN 100 MPA OR A HARDNESS OF 302 HB OR 310 HV MUST BE STRESS-RELIEVED AND DE-EMBRITTLEMENT HEAT TREATED AT 374 TO 410 DEG F (190 TO 210 DEG C) FOR ONE HOUR AT TEMPERATURE. THIS MUST BE DONE BEFORE AND AFTER THE PARTS ARE PUT IN THE STRIPPING SOLUTION.

CAUTION

THE HEAT TREATMENTS ARE ALSO NECESSARY ON STEELS WHERE THE HARDNESS RANGE INCLUDES 1000 MPA OR 302 HB (FOR EXAMPLE, 930 TO 1080 MPA OR 283 TO 321 HB).

Procedure

1. SUBTASK 70-33-59-200-001 Control of the Nitric Acid Solution

   1. Renew the solution when it is no longer effective.

      For instructions to the make-up the solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-001. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-002.

2. SUBTASK 70-33-59-200-002 Control the Alkali Derusting Solutions

   
   WARNING
   ALKALI DERUSTERS CONTAIN SODIUM HYDROXIDE; REFER TO THE SODIUM HYDROXIDE SPECIFIC SAFETY PRECAUTIONS.

   1. The solution should be analyzed and kept by the manufacturer's instructions or discarded when the solution has no effect.

      For instructions to the make-up the solutions, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-002-001 and SUBTASK 70-33-59-100-002-002. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-003.

3. SUBTASK 70-33-59-200-003 Control of the Cyanide Solution

   
   CAUTION
   KEEP THE FREE CYANIDE CONTENT ABOVE 5.4 OZ. WT/GAL (40 G/L) TO PREVENT ATTACK ON THE BASE METAL.

   1. For instructions to the make-up the solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-003. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-004.

      NOTE

      To keep the stripping solution at a satisfactory efficient, make sure the free cyanide content is at 3.16 oz. wt/gal (90 g/l).

   2. Analyze for free cyanide content.

      1. With a pipette, transfer a 2 ml cooled sample into a suitable beaker.

      2. Dilute to approximately 30 ml with CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER.

      3. Add a crystal of CoMat 01-097 POTASSIUM IODIDE KI and titrate with N/10 silver nitrate solutions (prepared from CoMat 01-059 SILVER NITRATE AgNO3 to a yellowish turbidity.

         1 ml of N/10 AgNO3 = 0.0098 g NaCN therefore ml of N/10 AgNO3 x 0.0098 x 1000/2 = g /NaCN.

         i.e. ml of N/10 AgNO3 x 4.9 = g /NaCN.

      4. Add CoMat 01-062 NICKEL ELECTROPLATE STRIPPINGSOLN or alternatives for each addition of cyanide proportional to the initial make-up.

      5. Discard the solution when the amount of CoMat 01-062 NICKEL ELECTROPLATE STRIPPINGSOLN added, equals that for the initial make-up.

4. SUBTASK 70-33-59-200-004 Control of the 10 Percent and 30 Percent Sulfuric Acid Solution

   1. General.

      1. The solution should be analyzed frequently, two times each day if in continual use, to be sure that the acid content is kept within the specified range.

      2. If the solution is not in frequent use, it must be analyzed before it is used and correction to the solution made as necessary.

   2. Analysis Method.

      1. With a pipette, transfer a 20 ml sample into a 200 ml flask.

      2. Dilute to the mark with CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER and shake well.

      3. With a pipette, transfer 20 ml of this diluted solution into a suitable beaker.

      4. NOTE

         To calculate the amount of addition, multiply the g/l low by the capacity of the tank (in Imperial gallons) and divide the result by 1803.2 to give the number of Imperial gallons of sulfuric acid (S.G. 1.84).

         Add a few drops of CoMat 01-064 INDICATOR and titrate with N sodium hydroxide prepared from CoMat 01-008 SODIUM HYDROXIDE NaOH (CAUSTIC SODA), SOLID to a yellow end point. The following will then apply:

         1 ml N.NaOH = 0.049 g H2SO4.

         thus ml N.NaOH x 0.049 x 500 = g/l H2SO4.

      5. For instructions on the make-up the solutions, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-004 or SUBTASK 70-33-59-100-010. To use the solutions refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-005 or SUBTASK 70-33-59-300-010.

5. SUBTASK 70-33-59-200-005 Control of Electrolytic Rochelle Carbonate and Alternative Sodium Carbonate Solutions

   1. The solution can be operated with or without analytical control. It is recommended the solution is used with analytical control.

   2. With Analytical Control.

      1. Analyse for sodium carbonate content at the initial make up and at intervals of one week minimum.

         1. Put 10 mls of the solution into a conical flask.

         2. Add a few drops of CoMat 01-355 INDICATOR to the solution, and titrate with 1N sulfuric acid (from CoMat 01-043 SULFURIC ACID H2SO4) until the indicator just becomes pink.

         3. Repeat with a second sample to confirm the result.

         4. NOTE

            When you make additions of CoMat 01-030 SODIUM CARBONATE Na2CO3, add CoMat 01-066 TARTARIC ACID CRYSTALS at the ratio of 239 g of CoMat 01-066 TARTARIC ACID CRYSTALS to 1 kg of CoMat 01-030 SODIUM CARBONATE Na2CO3.

            Carbonate strength = burette reading x 5.3.

            Addition necessary = (Target concentration - Actual concentration) x tank volume (l).

      2. Measure the pH of the solution with a calibrated pH meter to the manufacturer's instructions. Adjust the pH by additions of CoMat 01-030 SODIUM CARBONATE Na2CO3 or CoMat 01-066 TARTARIC ACID CRYSTALS, as necessary.

   3. Without Analytical Control.

      1. Analysis the solution for sodium carbonate content and measure the pH of the solution at the initial make-up to confirm the solution is as specified.

      2. If the solution is operated without analytical control, the solution must be discarded when no longer effective.

   4. Control the chloride content (as NaCl) to 0.2 g/l maximum.

   5. For instructions to make-up the Rochelle carbonate salt solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-005-001. To make-up the alternative Sodium carbonate salt solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-005-002. To use these solutions, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-006.

6. SUBTASK 70-33-59-200-006 Control of the Alkali Permanganate Solution

   
   WARNING
   ALKALI PERMANGANATE SOLUTIONS CONTAIN SODIUM HYDROXIDE. REFER TO SODIUM HYDROXIDE SPECIFIC SAFETY PRECAUTIONS.

   1. The solution should be analyzed and kept by the manufacturer's instructions or discarded when the solution has no effect.

   2. For instructions to make-up the solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-006-001 and SUBTASK 70-33-59-100-006-001-000. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-007.

7. SUBTASK 70-33-59-200-007 Control of the Chromic Acid Neutralizing Solution

   1. The chromic acid solution strength must be kept between 12 and 16 oz. wt/gal (90 to 120 g/l) by regular analysis.

   2. In addition to chemical control, measurement checks must be made ever day on parts being stripped or on suitably polished magnesium alloy test samples.

      The maximum permitted dimensional change is 0.0001 inch (0.003 mm) for each surface. A visible indication of excessive metal removal is when the polished magnesium alloy test piece appears dull.

   3. Analyze for free chromic acid.

      1. With a pipette transfer a 10 ml sample to a 400 ml beaker.

      2. Dilute with CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER to approximately 100 ml.

      3. Titrate with a N/2 solution of sodium carbonate (prepared from CoMat 01-012 ISOPROPANOL ALCOHOL (CH3)2CHOH) to a permanent turbidity.

         The number of ml N/2 sodium carbonate solution required is the titration value.

         Titration value x 5 = CrO3 g/l.

      4. When dealing with freshly prepared solutions of chromic acid that do not contain chromium chromate, no precipitate occurs with sodium carbonate and thus the Chromic Oxide content is obtained as follows:

         1. With a pipette transfer a 10 ml sample to a 500 ml standard flask.

         2. Dilute with CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER to 500 ml and shake well.

         3. Transfer 10 ml of the diluted sample to a 600 ml beaker and add 10 ml at 50 percent H2SO4 (prepared from CoMat 01-043 SULFURIC ACID H2SO4) .

         4. Add 19,5 ml of standard ferrous ammonium sulfate (prepared from CoMat 01-054 FERR.AMMON.SULPHATE FeSO42S04 6H2O) and titrate with N/10 potassium permanganate (prepared from CoMat 01-055 POTASSIUM PERMANGANATE KMnO4) to a pink end point.

         5. Add a further 0.5 ml of standard ferrous ammonium and titrate to a faint purple end point with N/10 KMnO4.

            1. The amount of KMnO4 used is the titration value, represented by TV1 in the formula. Refer to step (f).

            2. Carry out a blank determination with each analysis as follows:

            3. Put 10 ml of CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER into a 600 ml beaker and add 10 ml of 50 percent H2SO4 (prepared from CoMat 01-043 SULFURIC ACID H2SO4 H2SO4).

            4. Add 19,5 ml of standard ferrous ammonium sulfate from a burette and titrate quickly with N/10 KMnO4 to a pink end point.

         6. Add a further 0.5 ml of standard ferrous ammonium sulfate and titrate again with N/10 KMnO4, in drops, to a faint purple end point.

            1. The amount of KMnO4 used is the titration value, represented by TV2 in the following formula:

               As 1 ml of N/10 ferrous ammonium sulfate is equivalent to 0.00333 g of CrO3.

               g/l CrO3 = (TV2 - TV1) x normality of KMnO4 x 16.66.

   4. Analyze for H2SO4 - Method 1.

      1. With a pipette transfer a 50 ml filtered sample into 250 ml standard flask.

      2. Dilute with CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER to 250 ml and shake well.

      3. Transfer 25 ml of the diluted solution into a suitable beaker and dilute with CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER to approximately 150 ml.

      4. Add 20 ml of CoMat 01-007 ETHYL ALCOHOL C2H5OH (DENATURED) and 10 ml of CoMat 01-006 HYDROCHLORIC ACID.

      5. Boil down to approximately 80 ml, cool and dilute with CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER to approximately 150 ml.

      6. Bring to the boil and add 15 ml of 10 percent barium chloride solution (prepared from CoMat 01-056 BARIUM CHLORIDE BaCl2x 2H2O).

      7. Allow the mixture to stand overnight or a similar period.

      8. Filter by decantation onto CoMat 02-011 FILTER PAPER.

      9. Wash the precipitate with hot water until all traces of green chromium salts have disappeared.

      10. Dry, ignite and weigh the precipitate as BaSO4.

          g/l H2SO4 = g BaSO4 x 83.8.

   5. Analyze for H2SO4 - Method 2.

      1. With a pipette transfer a 10 ml filtered sample into a 400 ml beaker.

      2. Add 10 ml of CoMat 01-006 HYDROCHLORIC ACID, 25 ml of CoMat 01-057 ACETIC ACID CH3COOH and 20 ml of CoMat 01-012 ISOPROPANOL ALCOHOL (CH3)2CHOH. Dilute with CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER to approximately 100 ml.

      3. Boil the mixture for 15 minutes and further dilute with CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER to approximately 150 ml.

      4. Bring to the boil and immediately add, while stirring, 15 ml of 10 percent barium chloride solution (prepared from CoMat 01-056 BARIUM CHLORIDE BaCl2x 2H2O).

      5. Maintain the solution at a temperature of 140 to 158 deg F (60 to 70 deg C) for two to four hours.

      6. Filter the precipitate by decantation on to CoMat 02-011 FILTER PAPER.

      7. Wash the precipitate with hot water until all remaining green chromium salts have disappeared.

      8. NOTE

         45 kg of CrO3 contains sulfate equivalent to approximately 60 ml of concentrated H2SO4 (S G 1.84).

         Dry the precipitate, ignite it at 1652 deg F (900 deg C) for 30 minutes and weigh it as BaSO4.

         g/l H2SO4 = g BaSO4 x 42.

   6. Chloride determination (Spec. 0.1g/l Cl max).

      1. With a pipette put a 20 ml filtered sample into a 400 ml beaker containing approximately 200 ml of CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER.

      2. Add approximately 10 ml of CoMat 01-058 NITRIC ACID HNO3 and heat to 140 to 158 deg F (60 to 70 deg C).

      3. Add 10 percent silver nitrate solution (prepared from CoMat 01-059 SILVER NITRATE AgNO3) until precipitation is complete.

      4. Check the supernatent liquid for chloride by adding a few drops of silver nitrate solution.

      5. Filter the solution through a previously weighed No. 4 sintered glass crucible.

      6. Wash the precipitate with:

         10 percent nitric acid solution (prepared from CoMat 01-058 NITRIC ACID HNO3).

         Cold CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER.

         CoMat 01-060 ACETONE (CH3)2CO.

      7. Dry at approximately 230 deg F (110 deg C).

      8. Cool the crucible and weigh again. The difference in weight is the amount silver chloride precipitated.

         Calculation - Concentration of chloride (g/l ion) = Wt of AgCl x 0.248 x 50.

   7. Control of chloride with silver chromate in 10 percent chromic acid solution.

      If CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER is used, silver chromate is not added at new make-up.

      The chromic acid solution volume should be maintained by adding CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER. If tap water is used, it will be necessary to precipitate the chlorides by adding CoMat 01-052 SILVER CHROMATE AgCrO4.

      1. One of the important controlling parameters in the control of 10 percent chromic acid is the processing of the test-piece to determine the metal removal rate; this is considered an important guide to the condition of this solution and metal removal rate can be determined as follows:

         The maximum permitted dimensional change after three minutes fully in the chromic acid solution at 149 to 158 deg F (65 to 70 deg C) shall be 0.00005 inch (0.0015 mm) / surface. This corresponds to a weight loss of 0.032 oz. wt/sq ft (1g/sq dm). A visible indication of excessive metal removal is when a magnesium alloy test piece polished with CoMat 05-064 WATERPROOF SILICON CARBIDE appears dull after three minutes immersion in the chromic acid solution.

   8. For instructions to make-up the solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-007. To use the solution refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-007.

8. SUBTASK 70-33-59-200-008 Control of the Nitric Acid Neutralizing Solution

   1. Analyze the solution by pipetting 5 ml of the cooled solution into a 400 ml beaker and dilute with approximately 75 ml of CoMat 01-201 DISTILLED, DEIONIZED, DEMINERALIZED, OR REVERSE OSMOSIS (RO) WATER. Add 5 drops of CoMat 01-011 INDICATOR and titrate it with 1N. sodium hydroxide solution to the pink end point.

      ml of 1N. NaOH solution X 12.6 = g/l HNO3.

   2. For instructions to make-up of the solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-008. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-007.

9. SUBTASK 70-33-59-200-009 Control of the Nitric Acid/Hydrogen Peroxide Solution

   1. The solution is operated without analytical control and must be discarded when the solution has no effect.

   2. For instructions to make-up of the Nitric acid/Hydrogen peroxide solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-009. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-009.

10. SUBTASK 70-33-59-200-010 Control of Enthone GT 376

    1. Control the solution by the manufacturer's instructions.

    2. For instructions to make-up of the Enthone GT 376 solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-011. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-011.

11. SUBTASK 70-33-59-200-011 Control of the Inhibited Hydrochloric Acid Solution

    1. The solution is operated without analytical control and must be discarded when the solution is no long effective.

    2. For instructions to make-up the Inhibited Hydrochloric acid solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-012. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-012.

12. SUBTASK 70-33-59-200-012 Control of the Aqua Regia Solution

    1. The solution is operated without analytical control and shall be discarded when no longer effective.

    2. For instructions to make-up the Aqua Regia solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-013. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-013.

13. SUBTASK 70-33-59-200-013 Control of the Hydrochloric Acid and Wetting Agent

    1. The solution is operated without analytical control and must be discarded when the solution has no long effect.

    2. For instructions to make-up of the hydrochloric acid and wetting agent solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-014. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-014.

14. SUBTASK 70-33-59-200-014 Control of Enstrip GT 317

    1. Control the solution by the manufacturer's instructions.

    2. For instructions to make-up of the Enthone GT 317 solution, refer to the SPM TASK 70-33-59-100-501, SUBTASK 70-33-59-100-015. To use the solution, refer to the SPM TASK 70-33-59-300-503, SUBTASK 70-33-59-300-015.