The existing 62 research papers have built a multi-scale anti-corrosion governance framework covering single fixed equipment, mobile skid-mounted devices, individual enterprises and regional industrial parks. Most of the existing risk prevention mechanisms are confined within the boundary of a single enterprise or regional cluster, ignoring the risk transmission characteristics along the whole industrial chain of titanium heating equipment. Defects originating from upstream titanium smelting, raw material rolling, welding material production will be inherited to the equipment manufacturing stage; non-standard processing, surface treatment and factory inspection loopholes will lay hidden corrosion risks for on-site installation and long-term operation; irregular construction, improper protective measures during engineering installation will cause passive film damage and residual stress concentration; inconsistent maintenance service standards and asymmetric technical information between third-party service providers and end users easily lead to repeated human-induced corrosion accidents. Corrosion failure of titanium heating equipment is often the cumulative result of multi-link defects along the industrial chain rather than isolated problems in the operation stage alone. Based on the existing full-lifecycle anti-corrosion theoretical system, this paper constructs a whole-industry-chain collaborative risk prevention and control mechanism covering raw material suppliers, equipment manufacturers, engineering installation contractors, operation and maintenance enterprises and end-user factories, realizes inter-party constraint, information traceability, standard interoperability and risk joint accountability among all industrial chain participants, blocks the transmission path of hidden corrosion risks from upstream to downstream, eliminates information barriers and specification implementation differences in each link, and completes the vertical expansion of the anti-corrosion governance system from regional horizontal cluster governance to whole industrial chain vertical collaborative governance.
1. Corrosion Risk Transmission Mechanism Along the Whole Industrial Chain of Titanium Heating Equipment
Risk inheritance and progressive deterioration exist in every upstream and downstream link of the industrial chain, and the typical transmission paths are summarized into four core chains: First, raw material quality risk inheritance chain. If upstream titanium ingot smelting fails to strictly control oxygen, carbon, iron and other impurity elements, the finished titanium tube will have poor ductility, low passive film compactness and weak resistance to chloride ion penetration. Unqualified welding wires, flux and auxiliary materials will lead to coarse grain welding structures, welding residual stress and tiny welding defects such as porosity and cracks. These inherent material defects cannot be eliminated in the subsequent processing stage, and will evolve into stress corrosion cracking, pitting corrosion initiation points under alternating temperature, vibration and corrosive medium service conditions. Raw material batch information, component inspection reports and performance test records are not shared downstream, resulting in the inability to trace the root cause once equipment corrosion failure occurs. Second, equipment processing and manufacturing defect inheritance chain. In the tube cutting, cold bending, welding, heat treatment and surface passivation processes of equipment manufacturers, non-standard operations such as excessive bending deformation, improper welding heat input, incomplete stress relief and improper pickling passivation will leave surface scratches, high residual tensile stress and discontinuous defective passive films. Factory non-destructive testing with insufficient sampling ratio and relaxed acceptance standards will fail to screen out potential hidden defects. After finished equipment is delivered to downstream users, these manufacturing defects gradually evolve into various localized corrosion failures under long-term operating loads. Third, engineering installation construction damage risk transmission chain. In the process of hoisting, transportation, pipeline assembly, bolt fastening and pressure test at the project site, improper hoisting protection, direct collision of titanium surfaces with steel tools, over-torque or under-torque bolt fastening, non-standard water pressure test medium selection will scratch the passive film, introduce high assembly residual stress and leave chloride ions attached to the inner wall of the pipeline. Installation contractors fail to hand over construction defect records, on-site protection inspection data and standardized anti-corrosion operation precautions to end users, leading to users being unaware of hidden damage points during subsequent operation and maintenance. Fourth, third-party service information asymmetry risk chain. When enterprises outsource chemical cleaning, flaw detection, passivation renovation and equipment overhaul to external technical service providers, inconsistent anti-corrosion operation standards, incompatible cleaning agents, uncalibrated testing instruments and untrained construction personnel will cause secondary damage to titanium equipment. The failure case data, maintenance parameter records and hidden danger rectification information are not synchronously shared between service providers and users, leading to repeated maintenance deviation and recurrent corrosion accidents.
2. Collaborative Anti-Corrosion Standard Docking and Whole-Chain Unified Technical Baseline Construction
To block cross-link risk transmission, the first core measure is to realize the equivalence docking of anti-corrosion technical specifications among all industrial chain participants and formulate a unified whole-chain baseline standard: Unify raw material access technical specifications. Formulate mandatory chemical composition limits, mechanical property indicators, low-temperature toughness requirements and batch inspection rules for titanium tubes, titanium plates and matching welding consumables. Upstream raw material suppliers must provide full batch inspection reports, original smelting records and corrosion performance test data, and label unique batch traceability codes on all delivered materials. Materials failing to meet the impurity control standard are prohibited from flowing into downstream equipment processing links. The raw material anti-corrosion screening clauses summarized in previous research are incorporated into the procurement bidding qualification threshold of equipment manufacturers. Unify equipment manufacturing and factory acceptance anti-corrosion standards. All processing enterprises must implement unified requirements for cold bending radius limitation, post-welding stress relief process, full coverage non-destructive testing range and chemical passivation technical parameters. The surface roughness, passive film thickness, salt spray corrosion resistance and other acceptance indicators are uniformly defined; finished equipment must be attached with manufacturing anti-corrosion file packages including process records, inspection reports and surface protection construction records, which will be transferred to installation contractors and final users along with equipment delivery. Unify on-site engineering installation anti-corrosion construction specifications. Compile industry-wide standardized anti-corrosion construction operation guidelines for equipment hoisting protection, flange fastening torque range, temporary sealing material selection, pressure test medium requirements and post-installation surface damage repair. Installation enterprises must record all on-site protection inspection data, surface scratch repair records and pipeline assembly process parameters, and form a complete installation anti-corrosion handover document to realize transparent information handover between construction side and user side. Unify third-party maintenance service access and operation standards. Establish a qualification filing system for anti-corrosion technical service providers, require all maintenance teams to pass the unified industrial chain competency certification formulated based on the post training system in the previous research. Uniformly specify the permitted range of cleaning agents, passivation processes, flaw detection calibration standards and maintenance construction operation norms; service providers must upload all maintenance parameter data, hidden danger inspection records and repair schemes to the whole-chain traceability platform after each service.
3. Whole Industrial Chain Anti-Corrosion Traceability Information Platform and Collaborative Risk Early Warning Mechanism
Build a blockchain-based whole-industry-chain anti-corrosion traceability platform to realize full-process data recording, non-tamperable storage and cross-subject authorized sharing: Each batch of titanium raw materials is assigned a unique source traceability code, which records smelting time, chemical inspection data, rolling process parameters and delivery inspection reports. After being processed into heating equipment, the equipment unique asset code is bound with the raw material batch code, recording all processing, welding, heat treatment, passivation and factory inspection data during manufacturing. In the engineering installation stage, hoisting protection records, fastening torque detection data, pressure test records and surface damage repair information are associated with the equipment code; in the operation and maintenance stage, medium monitoring data, periodic inspection records, cleaning and passivation maintenance archives, third-party service construction records and all corrosion fault disposal reports are continuously uploaded to the platform. All link data is encrypted and stored on the blockchain, which can be authorized and queried by upstream and downstream participants, realizing rapid reverse traceability from equipment corrosion failure point to raw material batch, processing parameter, construction behavior and maintenance operation. Based on full-chain historical defect data, build a collaborative risk early warning model. When multiple batches of raw materials from the same supplier have abnormal impurity indicators, the platform pushes upstream risk early warning to all downstream equipment manufacturers that have purchased such batches, reminding enterprises to strengthen incoming material sampling inspection; if multiple sets of equipment processed by the same manufacturer have similar welding stress-related corrosion failures, the system triggers manufacturing process risk warning, requiring the manufacturer to optimize welding and stress relief processes and conduct retrospective inspection of all delivered equipment of the same batch; when multiple maintenance cases operated by the same third-party service team cause passive film damage accidents, the platform issues service qualification risk reminder, restricts the service scope of the institution and organizes mandatory retraining for all technicians. Different from single-equipment and park-level early warning, whole-chain collaborative early warning can trace risk sources from the upstream root link and prevent large-scale batch equipment hidden danger accidents.
4. Whole-Chain Collaborative Constraint Mechanism Including Joint Quality Assurance, Risk Sharing and Joint Accountability
Form institutional binding constraints for all participants to avoid evasion of anti-corrosion responsibility leading to risk transfer: First, implement whole-chain joint quality assurance agreement. In the procurement, contracting and service contracts of each link, the anti-corrosion quality liability clauses are clearly stipulated. Upstream raw material suppliers are liable for batch corrosion defects caused by unqualified material indicators; equipment manufacturers are responsible for failures derived from non-standard processing and factory inspection loopholes; installation contractors bear the liability for equipment damage caused by unprotected construction; third-party service institutions need to compensate for economic losses caused by non-standard maintenance leading to equipment corrosion. Second, establish industrial chain anti-corrosion credit rating mechanism. Regularly evaluate the standard implementation compliance rate, defect batch frequency, user failure complaint rate and data uploading integrity of each participant, and divide credit grades. High-credit suppliers, manufacturers and service providers can obtain bidding priority and cooperative scale expansion incentives; low-credit enterprises will be included in the industry risk early warning list, face procurement access restrictions and mandatory rectification requirements until cooperative qualification is cancelled. Third, build cross-subject joint hidden danger rectification mechanism. Once batch corrosion hidden dangers are discovered in downstream user equipment, the platform initiates joint investigation by upstream suppliers, manufacturers and service providers, jointly formulating rectification schemes, retrospectively screening all related batch equipment, and implementing unified hidden danger elimination and anti-corrosion repair. All rectification records are archived into the enterprise credit file, forming a closed loop of risk discovery, joint investigation, unified rectification and credit evaluation.
5. Typical Whole Industrial Chain Collaborative Anti-Corrosion Application Schemes
表格
| Industrial Chain Risk Link | Typical Hidden Defect Type | Core Collaborative Governance Measures | Whole-Chain Governance Benefits |
|---|---|---|---|
| Upstream Titanium Raw Material Supply | Excessive impurity content leading to poor passive film corrosion resistance | Unified batch traceability coding, mandatory incoming multi-index sampling inspection, raw material credit rating management | Avoid batch material quality defects leading to large-area equipment pitting corrosion accidents |
| Equipment Manufacturing & Factory Delivery | Welding residual stress, incomplete passivation, insufficient NDT sampling | Unified processing anti-corrosion baseline, full-process manufacturing file handover, batch equipment retrospective inspection mechanism | Cut manufacturing-derived corrosion failure rate by more than 65%, realize rapid failure root traceability |
| On-Site Engineering Installation Construction | Surface passive film scratch, bolt torque out of tolerance, chloride residue introduced | Standardized anti-corrosion construction guidelines, full installation data filing, on-site damage repair closed-loop acceptance | Eliminate construction-induced initial corrosion defects and avoid responsibility disputes after equipment failure |
| Third-Party Operation & Maintenance Service | Incompatible cleaning agents, non-calibrated testing equipment, irregular construction | Unified service qualification certification, maintenance whole-process data uploading, service enterprise credit assessment | Reduce human-induced maintenance corrosion accidents by over 70%, standardize the whole industry service market |
This research vertically expands the existing multi-scale anti-corrosion governance system from single equipment, single enterprise and industrial park horizontal cluster to the whole industrial chain of raw material-production-installation-operation-maintenance-service. Through unified cross-link technical baseline, blockchain full-process traceability, whole-chain collaborative risk early warning and joint liability credit constraint mechanism, the risk inheritance and transmission path of corrosion hidden defects from upstream to downstream is completely blocked. Combined with the previous achievements of intelligent monitoring, low-carbon optimization, international standard alignment and talent competency management, the 63-set technical system realizes three-dimensional full coverage of micro single equipment lifecycle refined management, mesoscale regional industrial park horizontal collaborative prevention and macro whole industrial chain vertical joint risk control. It provides a replicable whole-industry-chain anti-corrosion collaborative governance solution for the high-quality standardized development of the titanium heating equipment industry, fundamentally reduces the batch safety and economic risks of industrial equipment caused by cross-link information isolation and responsibility fragmentation, and further improves the systematicity, traceability and sustainable development capability of the industrial anti-corrosion governance system.
