1、MIL-I-3752A b .4777706 0337372 2 P - JI miJJ964. , SUPERSEDING NIGI-19528 (CG) 12 June 1956 MILITARY SPECIFICATION INHIBITOR, CORROSION, LIQUID COOLING SYSTEM (DICHROMATE TYPE) 1, SCOPE 1.1 Scope.- This specification covers an inhibitor suitable for use in closed cooling water systems of internal co
2、mbustion engines; the inhibitor possesses anti-corrosive properties without ingredienta which would be injurious to such cooling systems. 1.2 Classification .- 1.2.1 The inhibitor furnished under this specification shall be of one type and grade as hereinafter specified. 2. APPLICABLE DOCUMENTS 2.1
3、The following documents, of the issue in effect on date of invitation for bids, form ai part of this speeification to the extent specified herein. SPECIFICATIONS Federal - O-B-4 1 Battery Water 04-2 75 Chemicals, Photographic “Single Substancetr General Specification for 0-5-595 Sodium Dichromate, T
4、echnical Grade (Sodium Bichrompte) Sodium Dichromate Dihydrate PPP-C-96 Cans, Metal 28 Gage and Lighter (Copies of specifications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer,) e: .
5、FSC 6850 Licensed by Information Handling ServicesMIL-I-3752A b m 777790b 0337373 4 m f . . .- .- - MIL-1-1952 8A( CG) 3. REQUIREMENTS 3.1 Material. - 3.1.1 Sodium dichromate. - The sodium dichromate used in the inhibitor shall conform to the requirements of Specification O-S-595. 3.1.2 Sodium hydro
6、xide. - The sodium hydroxide used in the inhibitor shall conform to class II of Specification O-C-275. 3.1.3 Distilled water. - The distilled water used in the inhibitor shall conform to the requirements of Specification 0-B-41. 3.2 Composition. - The inhibitor shall consist of a solution of the ing
7、redients listed in Table I; the quantities shown in the table are those required for one gallon of the solution. TABLE I Sodium dichromate - Na2Cr207.2H20 - - - - - - 46.0 ounces Sodium hydroxide - NaOH (minimum 98 percent) 12.9 ounces Distilled water - H20 - - - - - - - - - - - - 113.9 ounces 3.2.1
8、 Prior to packing in containers, the inhibitor shall be filtered to remove all residue. 3.3 Properties. - 3.3.1 AikaiiniQ. - The pH value of the solution shall be between 9. O and 10.5 when tested according to the method described in 4.7.1. 3.3.2 Specific gravity. - The specific gravity of the solut
9、ion shall be between 1.29 and 1.31 when tested according to the method described in 4.7.2. 3.3.3 Clarity. - The solution shall be clear and free from any sediment or foreign matter. 3.3.4 Sodium dickromate content, - The inhibitor shall show a sodium dichromate (Na2Cr207.2H20) content of 25.5 to 27.
10、5 percent by weight when tested according to the method described in 4.7.3. . . e: 1 Ir Licensed by Information Handling ServicesMIL-I-L7528A 68 7799906 OLL737q b W MIGI-l9528A(CC) 4. SAMPLING, INSPECTION, AND TEST PROCEDURES 4.1 LsEection responsibility.- The supplier is responsible for the Except
11、performance of all inspection requirements as specified herein, as otherwise specified, the supplier may utilize his own or any other inspection faciiities and services acceptable to the Government. records of the examinations and tests shall be kept complete and available to the Government. The Gov
12、ernment reserves the right to perform any of the inspection set forth in the specification where such inspections are deemed necessary to assure supplies and services conforms to prescribed requirements. Inspection 4.2 Lot.- For purpose of sampling, inspection, and testing, a lot shall consist of al
13、l material offered for delivery at one time, manufactured as one batch. 4.3 Sampling.- Two containers shall be taken by the contractor at random from among the containers comprising the lot for testing as specified in 4.7 through 4.7.3.2. 4.4 Inspecti%- Inspection may be made at any time during the
14、entire process of manufacture. method used in the manufacture of the inhibitor shall not relieve the contractor or responsibility for an unsatisfactory finished product, inspection of the finished product shall be made at the point of delivery designated in the contract or purchase order. The passin
15、g as satisfactory of any material or Final 4.5 Containers.- Sample filled containers (quart or gallon) selected on the basis of four out of each 100 in the lot shall be examined for defects of construction of the container and for evidence of leakage, for unsatis- factory markings, and all other pre
16、paration for delivery requirements. filled container shall also be weighed to determine the amount of content$* Any container having one or more defects, or under required fill, shall be rejected and if the number of defective containers exceeds two per each hundred in the lot, the lot shall be reje
17、cted. Zach 4.6 Re1ection.- Lots shall be accepted or rejected by the GovermnS inspector on the basis of the laboratory test report. 4.7 Tests.- 4.7.1 Alkalinity.- The pH value of the soluticn as received shall be determined with suitable pH meter accurate to 0.1 pH. Specific 8ravity.- The specific g
18、ravity o the solution a* received shall be deteminad at 25/15.6OC., by means clf e. aq and the fact that the Government may have formulated, furnished, or in any way supplied the said drawings, specifications, or other data, is not to be regarded by implication or otherwise as in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto. - _. - 6 Preparing Activity: U. S. Coast Guard . # ?*a- O(. *- o Licensed by Information Handling Services
