In an autoclave I assume you would deal with seals, insulation and/or coatings. Try:
ASTM F1277-95 Standard Test Method for Determination of Leachable Chloride in Packing and Gasketing Materials by Ion-Selective Electrode Technique
ASTM D512 Test Methods for Chloride Ion in Water
ASTM D2448-85 (1996)e1 Standard Test Method for Water-Soluble Salts in Pigments by Measuring the Specific Resistance of the Leachate of the Pigment.
ASTM C871-95 Standard Test Methods for Chemical Analysis of Thermal Insulation Materials for Leachable Chloride, Fluoride, Silicate, and Sodium Ions.
ASTM PS118-99 Provisional Standard Test Method for Water-Extractable Chloride in Aggregate (Soxhlet Method)
ASTM D512-89(1999) Standard Test Methods for Chloride Ion In Water
FSA NMG-202-96
Good luck